Updated on 2022/08/29

写真a

 
MATSUMOTO Takahiro
 
Organization
Research Field in Engineering, Science and Engineering Area Graduate School of Science and Engineering (Engineering) Department of Engineering Information Science and Biomedical Engineering Program Professor
Title
Professor
External link

Degree

  • Doctor of Philosophy in Engineering ( 2007.1   Yamaguchi University )

  • Master of Engineering ( 1998.3   Kagoshima University )

  • Bachelor of Engineering ( 1996.3   Kagoshima University )

Research Interests

  • spread spectrum, CDMA, pseuderamdom sequence, scramble, digital watermark, pulse compression rader, digital signal processing

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering

Education

  • Kagoshima University   Graduate School of Engineering   Division of Information and Computer Science

    1996.4 - 1998.3

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    Country: Japan

  • Kagoshima University   Fuculty of Engineering   Department of Information and Computer Science

    1994.4 - 1996.3

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    Country: Japan

  • Kagoshima National College of Technology   Department of Information Engineering

    1989.4 - 1994.3

Research History

  • Kagoshima University   Graduate School of Science and Engineering (Engineering)   Professor

    2021.4

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    Country:Japan

  • Yamaguchi University   Graduate School of Sciences and Technology for Innovation   Lecturer (Non-Full-time)

    2021.6 - 2022.3

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    Country:Japan

  • Yamaguchi University   Graduate School of Sciences and Technology for Innovation (Engineering)   Associate Professor

    2016.4 - 2021.3

  • YAMAGUCHI UNIVERSITY   Graduate School of Science and Engineering(Engineering)   Associate Professor

    2015.4 - 2016.3

  • YAMAGUCHI UNIVERSITY   University Evaluation Department   Associate Professor

    2012.4 - 2015.3

  • The Univerisity of Melbourne   visiting reseacher

    2010.9 - 2011.3

  • Fukuoka Institute of Technology   Faculty of Engineering   Lecturer (Non-Full-time)

    2010.4 - 2011.9

  • YAMAGUCHI UNIVERSITY   Graduate School of Science and Engineering(Engineering)   Assistant Professor

    2007.4 - 2012.3

  • YAMAGUCHI UNIVERSITY   Graduate School of Science and Engineering(Engineering)   Research Assistant

    2006.4 - 2007.3

  • YAMAGUCHI UNIVERSITY   Faculty of Engineering   Research Assistant

    1998.4 - 2006.3

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Professional Memberships

  • IEEE

    2011

  • The institute of Electronics, Information and Communication Engineers

    1996

Committee Memberships

  • 電子情報通信学会   情報理論(IT)研究専門委員会専門委員  

    2022.6   

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    Committee type:Academic society

  • The 10th International Workshop on Signal Design and its Application in Communications (IWSDA'22)   Technical Program Committee  

    2021.8   

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    Committee type:Academic society

  • 電子情報通信学会   英文論文誌(A)信号設計とその通信への応用小特集号(令和3年2月号)編集委員  

    2019.12 - 2021.2   

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    Committee type:Academic society

  • IEEE広島支部   会計幹事  

    2019.1 - 2020.12   

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    Committee type:Academic society

  • 電子情報通信学会   第42回情報理論とその応用シンポジウム(SITA2019)実行委員(会場)  

    2018.11 - 2019.11   

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    Committee type:Academic society

  • 電子情報通信学会   第4回有限体理論とその擬似乱数系列生成への応用ワークショップ実行委員長  

    2017.8 - 2018.8   

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    Committee type:Academic society

  • 電子情報通信学会   英文論文誌(A)編集委員会編集委員  

    2017.6 - 2021.6   

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    Committee type:Academic society

  • IEEE広島支部   理事  

    2013.1 - 2014.12   

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    Committee type:Academic society

  • 電子情報通信学会   ワイドバンドシステム(WBS)研究専門委員会専門委員  

    2012.12   

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    Committee type:Academic society

  • 情報理論とその応用学会   第32回情報理論とその応用シンポジウム(SITA2009)実行委員(総務)  

    2008.12 - 2009.12   

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    Committee type:Academic society

  • 電子情報通信学会   ソサイエティ論⽂誌編集委員会常任査読委員  

    2021.6   

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    Committee type:Academic society

  • The 24th International Conference on Advanced Communication Technology (ICACT2022)   実行委員(Technical Program Committee)  

    2021.2 - 2022.2   

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    Committee type:Academic society

  • The 23rd International Conference on Advanced Communication Technology (ICACT2021)   実行委員(Technical Program Committee)  

    2020.2 - 2021.2   

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    Committee type:Academic society

  • IEEE   Metro Area Workshop 2020 in Hiroshima会計幹事  

    2019.10 - 2020.10   

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    Committee type:Academic society

  • The 22nd International Conference on Advanced Communication Technology (ICACT2020)   実行委員(Technical Program Committee)  

    2019.2 - 2020.2   

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    Committee type:Academic society

  • The 9th International Workshop on Signal Design and its Application in Communications (IWSDA'19)   実行委員(Technical Program Committee)  

    2018.10 - 2019.10   

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    Committee type:Academic society

  • The 21st International Conference on Advanced Communication Technology (ICACT2019)   実行委員(Technical Program Committee)  

    2018.2 - 2019.2   

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    Committee type:Academic society

  • 電子情報通信学会   英文論文誌(A)信号設計とその通信への応用小特集号(平成30年12月号)編集委員  

    2017.10 - 2018.12   

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    Committee type:Academic society

  • 電子情報通信学会   和文論文誌(A)編集委員会編集委員  

    2017.6 - 2021.6   

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    Committee type:Academic society

  • The 20th International Conference on Advanced Communication Technology (ICACT2018)   実行委員(Technical Program Committee)  

    2017.2 - 2018.2   

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    Committee type:Academic society

  • The 8th International Workshop on Signal Design and its Application in Communications (IWSDA'17)   実行委員(General Secretary)  

    2016.9 - 2017.9   

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    Committee type:Academic society

  • 電子情報通信学会   英文論文誌(A)信号設計とその通信への応用小特集号(平成29年4月号)編集委員  

    2016.5 - 2017.4   

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    Committee type:Academic society

  • The 19th International Conference on Advanced Communication Technology (ICACT2017)   実行委員(Technical Program Committee)  

    2016.2 - 2017.2   

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    Committee type:Academic society

  • 信号処理学会   臨時査読委員  

    2015.9   

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    Committee type:Academic society

  • The 18th International Conference on Advanced Communication Technology (ICACT2016)   実行委員(Technical Program Committee)  

    2015.1 - 2016.1   

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    Committee type:Academic society

  • 電気・情報関連学会中国支部   平成27年度電気・情報関連学会中国支部連合大会実行委員(講演出版)  

    2014.10 - 2015.10   

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    Committee type:Academic society

  • The 15th International Symposium on Communications and Information Technologies (ISCIT 2015)   実行委員(Technical Program Committee)  

    2014.10 - 2015.10   

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    Committee type:Academic society

  • The 7th International Workshop on Signal Design and its Application in Communications (IWSDA'15)   実行委員(Technical Program Committee)  

    2014.9 - 2015.9   

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    Committee type:Academic society

  • The 17th International Conference on Advanced Communication Technology (ICACT2015)   実行委員(Technical Program Committee)  

    2014.7 - 2015.7   

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    Committee type:Academic society

  • 電子情報通信学会   英文論文誌(A)信号設計とその通信への応用小特集号(平成26年12月号)編集委員  

    2014.2 - 2014.12   

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    Committee type:Academic society

  • 電気学会   臨時査読委員  

    2013.7   

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    Committee type:Academic society

  • 情報処理学会   臨時査読委員  

    2013.6   

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    Committee type:Academic society

  • The 16th International Conference on Advanced Communication Technology (ICACT2014)   実行委員(Technical Program Committee)  

    2013.2 - 2014.2   

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    Committee type:Academic society

  • IEEE広島支部   Educational Activity Chair  

    2013.1 - 2014.12   

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    Committee type:Academic society

  • The 6th International Workshop on Signal Design and its Application in Communications (IWSDA'13)   実行委員(Technical Program Committee)  

    2012.10 - 2013.10   

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    Committee type:Academic society

  • The 15th International Conference on Advanced Communication Technology (ICACT2013)   実行委員(Technical Program Committee)  

    2012.1 - 2013.1   

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    Committee type:Academic society

  • 電子情報通信学会   英文論文誌(A)信号設計とその通信への応用小特集号(平成24年11月号)編集幹事  

    2012.1 - 2012.11   

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    Committee type:Academic society

  • ICACT Transactions on the Advanced Communications Technology   編集委員  

    2011.6 - 2012.6   

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    Committee type:Academic society

  • The 14th International Conference on Advanced Communication Technology (ICACT2012)   実行委員(Technical Program Committee)  

    2011.2 - 2012.2   

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    Committee type:Academic society

  • The 13th International Conference on Advanced Communication Technology (ICACT2011)   実行委員(Technical Program Committee)  

    2010.2 - 2011.2   

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    Committee type:Academic society

  • The 12th International Conference on Advanced Communication Technology (ICACT2010)   実行委員(Technical Program Committee)  

    2009.2 - 2010.2   

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    Committee type:Academic society

  • The 4th International Workshop on Signal Design and its Application in Communications (IWSDA09)   実行委員(Publicity Chair)  

    2008.9 - 2009.9   

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    Committee type:Academic society

  • 電子情報通信学会   英文論文誌(A)信号設計とその通信への応用小特集号(平成20年12月号)編集幹事  

    2007.12 - 2008.12   

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    Committee type:Academic society

  • 日本機械学会   福祉工学シンポジウム2008実行委員  

    2007.9 - 2008.9   

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    Committee type:Academic society

  • 日本生活支援工学会   第6回生活支援工学系学会連合大会実行委員  

    2007.9 - 2008.9   

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    Committee type:Academic society

  • 電子情報通信学会   臨時査読委員  

    2007.1   

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    Committee type:Academic society

  • The 2nd International Workshop on Sequence Design and its Application in Communications (IWSDA05)   実行委員(Local Arrangement)  

    2004.10 - 2005.10   

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    Committee type:Academic society

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Studying abroad experiences

  • 2010.9 - 2011.3   メルボルン大学   客員研究員

Qualification acquired

  • Software Design & Development Engineer/Information Processing Engineer, Class 1

  • Fundamental Information Engineer/Information Processing Engineer, Class 2

  • System Administrator (upper class and beginners' class)

  • High School Teacher Specialization License (first and second kind,specialization)

 

Papers

  • Yuta Ida, Takahiro Matsumoto .  Interleaved Block Subcarrier Allocation and Power Combination for Frequency Symbol Spreading Multiuser Diversity OFDMA .  EURASIP Journal on Wireless Communications and Networking2022 ( 49 ) 1 - 23   2022.6Reviewed

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    In a FSS-OFDMA, the OFDM symbol is spread, and the subcarriers are assigned for each user in the frequency band. As the principal subcarrier allocation for each user, localized and interleaved allocations have been proposed, and the interleaved allocation is improved for the BER performance to avoid continuous deep faded subcarrier channels. Also, in the independent channel fluctuation for each user, the MUDiv gain is obtained by the individual and block subcarrier allocations. However, they have a trade-off problem between the BER performance and the computational complexity. To solve this problem, the interleaved block subcarrier allocation has been proposed. On the other hand, the interleaved block is only evaluated for the individual subcarrier and is not evaluated for the several subcarriers. Moreover, the power combination between the subcarrier and the channel is also improved for the BER performance, but the individual and block subcarrier allocations are only evaluated. Therefore, in this paper, we propose the interleaved block subcarrier allocation and the power combination for a FSS-MUDiv/OFDMA.

    DOI: 10.1186/s13638-022-02131-5

    Other Link: https://link.springer.com/article/10.1186/s13638-022-02131-5/fulltext.html

  • Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA .  Construction of Optical ZCZ Sequence Set with the Zero-Correlation Zone 2^z Suitable for PPM-OCDMA System .  Proc. of the 24th International Conference on Advanced Communication Technology (ICACT2022)   106 - 111   2022.2Construction of Optical ZCZ Sequence Set with the Zero-Correlation Zone 2^z Suitable for PPM-OCDMA SystemReviewed

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Yuta IDA, Kazuki MARUTA, Takahiro MATSUMOTO .  Phase Rotation and ASK Combination for SD-SM-MIMO .  Proc. of the 26th Asia-Pacific Conference on Communications (APCC2021)S6 ( 2 ) 1 - 5   2021.10Phase Rotation and ASK Combination for SD-SM-MIMOReviewed

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Dai OZAKI, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Study on BER Performance of Synchronous OCDMA System Using Optical ZCZ Sequence With Diffused Link Using Rake Reception .  Proc. of the 2021 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2021)   186 - 189   2021.3Study on BER Performance of Synchronous OCDMA System Using Optical ZCZ Sequence With Diffused Link Using Rake ReceptionReviewed

  • Ryosuke SHIMIZU, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Study on OCDMA System Using Two-Dimensional Optical ZCZ Sequences with Two Autocorrelation Peak Values .  Proc. of the 2021 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2021)   190 - 193   2021.3Study on OCDMA System Using Two-Dimensional Optical ZCZ Sequences with Two Autocorrelation Peak ValuesReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Generation Method of Two-Dimensional Optical ZCZ Sequences with High Correlation Peak Value .  IEICE Trans. FundamentalsE104-A ( 2 ) 417 - 421   2021.2Reviewed

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Institute of Electronics, Information and Communications Engineers (IEICE)  

    DOI: 10.1587/transfun.2020sdl0003

  • Yuta IDA, Kazuki MARUTA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  CR-QRM-MLD for SD-SM-MIMO with Null Modulation .  Proc. of the 39th IEEE International Conference on Consumer Electronics (ICCE2021)WNT(1) ( 4 ) 1 - 3   2021.1CR-QRM-MLD for SD-SM-MIMO with Null ModulationReviewed

  • Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Different Antenna Interleaved Allocation with Full and Divided WHT/DFT Spreading for HTRCI-MIMO/OFDM .  IEICE Trans. CommunicationsE103-B ( 12 ) 1438 - 1446   2020.12Reviewed

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Institute of Electronics, Information and Communications Engineers (IEICE)  

    DOI: 10.1587/transcom.2019ebp3216

  • Sho KURODA, Shinya MATSUFUJI, Takahiro MATSUMOTO, Yuta IDA, Takafumi HAYASHI .  Design of Compact Matched Filter Banks of Polyphase ZCZ Codes .  IEICE Trans. FundamentalsE103-A ( 9 ) 1103 - 1110   2020.9Design of Compact Matched Filter Banks of Polyphase ZCZ CodesReviewed

  • Naoya MUROKAWA, Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  CR‐QRM‐MLD for SD‐SM Hybrid MIMO systems .  Transactions on Emerging Telecommunications Technologies31 ( 8 ) 1 - 16   2020.8Reviewed

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  • Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Linear Interpolation Complex TFI for SP-OFDM .  Proc. of the 38th IEEE International Conference on Consumer Electronics (ICCE2020)   2020.1Linear Interpolation Complex TFI for SP-OFDMReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  A Generation Method of a Two-Dimensional Optical ZCZ Sequence with the Zero-Correlation Zone (4n-2) * (4n-2) .  Proc. of the 2019 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS2019)   2019.12A Generation Method of a Two-Dimensional Optical ZCZ Sequence with the Zero-Correlation Zone (4n-2) * (4n-2)Reviewed

  • Hideyuki TORII, Takahiro MATSUMOTO .  Comparison of Inter-Cell and Co-Channel Interference Power between A-ZCZ and GMO-ZCZ Sequence Sets by Computer Simulation .  Proc. of the 2019 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS2019)   2019.12Comparison of Inter-Cell and Co-Channel Interference Power between A-ZCZ and GMO-ZCZ Sequence Sets by Computer SimulationReviewed

  • Kanata MURAKAMI, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Construction of Code Generator of a Modified Pseudo-Orthogonal M- sequence Set .  Proc. of the 2019 International Workshop on Electronics, Information and Communication (IWEIC2019)   15 - 18   2019.11Construction of Code Generator of a Modified Pseudo-Orthogonal M- sequence SetReviewed

  • Kazuto OKAWA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Transmission Experiment of Optical ZCZ-CDMA System Using 2- or 4-PPM .  Proc. of the 2019 International Workshop on Electronics, Information and Communication (IWEIC2019)   41 - 44   2019.11Transmission Experiment of Optical ZCZ-CDMA System Using 2- or 4-PPMReviewed

  • Akihiro SAKAI, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Transmission Experiment of Underwater Optical CDMA System With Amplify-and- Forward Relay .  Proc. of the 2019 International Workshop on Electronics, Information and Communication (IWEIC2019)   21 - 24   2019.11Transmission Experiment of Underwater Optical CDMA System With Amplify-and- Forward RelayReviewed

  • Shutaroh TAKEHARA, Sho KURODA, Shinya MATSUFUJI, Takahiro MATSUMOTO, Yuta IDA .  On Logic Functions of Complementary Sets of Polyphase Sequences .  Proc. of the 2019 International Workshop on Smart Info-Media Systems in Asia (SISA2019)   104 - 108   2019.9On Logic Functions of Complementary Sets of Polyphase SequencesReviewed

  • Dai OZAKI, Sho ADACHI, Aoi SAWATARI, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Study on Model of Optical CDMA System Using LED and APD Elements .  Proc. of the 2019 International Workshop on Smart Info-Media Systems in Asia (SISA2019)   115 - 118   2019.9Study on Model of Optical CDMA System Using LED and APD ElementsReviewed

  • Ryosuke SHIMIZU, Koki NOMURA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Research on Optical CDMA System Using Two-Dimensional Optical ZCZ Sequence Set .  Proc. of the 2019 International Workshop on Smart Info-Media Systems in Asia (SISA2019)   109 - 114   2019.9Research on Optical CDMA System Using Two-Dimensional Optical ZCZ Sequence SetReviewed

  • Kahori OGASHIWA, Takahiro MATSUMOTO, Yue WANG, Joji KARIYA, Hiroo NAITOH .  Evaluation of the Yamaguchi University Self-Assessment and Evaluation System and Its Improvement .  International Journal of Institutional Research and Management3 ( 1 ) 1 - 14   2019.5Evaluation of the Yamaguchi University Self-Assessment and Evaluation System and Its ImprovementReviewed

  • Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Compensation of Deteriorated CSI Allocation Due to Fast Fading and Feedback Delay Based on Turbo Decision Direct for MUDiv/OFDMA .  IEICE Journal of Nonlinear Theory and Its Applications10 ( 1 ) 190 - 205   2019.4Compensation of Deteriorated CSI Allocation Due to Fast Fading and Feedback Delay Based on Turbo Decision Direct for MUDiv/OFDMAReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  A Generation Method of a Two-Dimensional Optical ZCZ Sequence with the Smallest Zero- Correlation Zone .  Proc. of the 2019 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2019)   172 - 175   2019.3A Generation Method of a Two-Dimensional Optical ZCZ Sequence with the Smallest Zero- Correlation ZoneReviewed

  • Sho KURODA, Takahiro MATSUMOTO, Yuta IDA, Shinya MATSUFUJI .  Construction of Matched Filter Bank of Multiphase ZCZ Code Reaches Mathematical Upper Bound .  Proc. of the 2019 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2019)   164 - 167   2019.3Construction of Matched Filter Bank of Multiphase ZCZ Code Reaches Mathematical Upper BoundReviewed

  • Hideyuki TORII, Takahiro MATSUMOTO .  Comparison of Co-Channel Interference Power between A-ZCZ Sequence Sets and GMO-ZCZ Sequence Sets by Computer Simulation .  Proc. of the 2019 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2019)   116 - 119   2019.3Comparison of Co-Channel Interference Power between A-ZCZ Sequence Sets and GMO-ZCZ Sequence Sets by Computer SimulationReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Modified Mutually ZCZ Set of Optical Orthogonal Sequences .  IEICE Trans. FundamentalsE101-A ( 12 ) 2414 - 2418   2018.12Modified Mutually ZCZ Set of Optical Orthogonal SequencesReviewed

  • Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Antenna Interleaved Allocation with FSS and Divided FFT Spreading for MIMO-OFDM .  Proc. of the 2018 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS2018)   372 - 377   2018.11Antenna Interleaved Allocation with FSS and Divided FFT Spreading for MIMO-OFDMReviewed

  • Shinya Matsufuji, Sho Kuroda, Yuta Ida, Takahiro Matsumoto .  A study on matched filter banks of P-phase ZCZ codes .  International Symposium on Wireless Personal Multimedia Communications, WPMC2017-   202 - 205   2018.2A study on matched filter banks of P-phase ZCZ codesReviewed

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    Publisher:IEEE Computer Society  

    A set of sequences with a zero correlation zone named as a ZCZ code can provide CDMA systems with interference free performance called ZCZ-CDMA. A ZCZ code with the slightly large zero correlation zone, in which family size reaches the mathematical upper bound, may be used to offer a CDMA system with high stability and transmission efficiency in inferior channel environment. This paper designs a matched filter bank (MFB) of p-phase ZCZ codes with the above properties, which can simultaneously take correlation between a received symbol sequence and every sequence in the ZCZ code, and can be designed by the minimum number of circuit elements. The MFB will provide a ZCZ-CDMA module which can construct a network system flexibly, since it can detect all data bits at the same time and can utilize them.

    DOI: 10.1109/WPMC.2017.8301808

    Scopus

  • Takahiro Matsumoto, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  Theoretical analysis of BER performance of OCDMA system using compact matched filter bank for an optical ZCZ sequence set .  International Symposium on Wireless Personal Multimedia Communications, WPMC2017-   315 - 319   2018.2Theoretical analysis of BER performance of OCDMA system using compact matched filter bank for an optical ZCZ sequence setReviewed

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    Publisher:IEEE Computer Society  

    The optical zero-correlation zone (ZCZ) sequence set is a set of pairs of binary and bi-phase sequences with a zero-correlation zone, and can provide optical code division multiple access (OCDMA) systems without cochannel interference. We have proposed the construction of a compact-type matched filter bank for this sequence set. However, the OCDMA system using this filter bank might have reduced bit error rate (BER) performance because the input-output characteristics of this filter bank for this sequence set with the zero-correlation zone 4z - 2, z = 1, 2, · · · are nonlinear. In this paper, we clarify that the BER performance of the OCDMA system using a compact-type matched filter bank is not influenced by the nonlinear characteristics of this filter bank, using the theoretical formula of BER characteristics and computer simulation.

    DOI: 10.1109/WPMC.2017.8301830

    Scopus

  • Yuta Ida, Takahiro Matsumoto, Shinya Matsufuji .  Packet splitting and adaptive modulation based on CSI of time domain for decode-and-forward cooperative OFDM systems in different channel model .  International Journal of Communication Systems31 ( 2 ) 1 - 17   2018.1Packet splitting and adaptive modulation based on CSI of time domain for decode-and-forward cooperative OFDM systems in different channel modelReviewed

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    Publisher:John Wiley and Sons Ltd  

    Cooperative communications obtain the transmission and channel diversity gains by using the relay node. However, since cooperative communications transmit the redundancy signal to obtain the transmission diversity gain, the transmission rate is degraded. Moreover, since cooperative communications add the interference in the relay node, the diversity gain is also degraded. The packet splitting has been proposed based on the channel state information of the time domain to obtain the good system performance without the redundancy signal. Moreover, the adaptive modulation has been proposed to improve the transmission rate. In this paper, we propose the combination method with the packet splitting and the adaptive modulation based on the channel state information of the time domain to improve the bit error rate and throughput performances for decode-and-forward cooperative orthogonal frequency division multiplexing systems in the different channel model. From the computer simulation results, we determine the optimum weight and threshold for the proposed method. Moreover, the proposed method shows the good bit error rate and throughput performances.

    DOI: 10.1002/dac.3451

    Scopus

  • Yasuaki Ohira, Takahiro Matsumoto, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  A compact matched filter bank for an optical ZCZ sequence set with zero-correlation zone 2z .  IEICE Transactions on Fundamentals of Electronics, Communications and Computer SciencesE101A ( 1 ) 195 - 198   2018.1A compact matched filter bank for an optical ZCZ sequence set with zero-correlation zone 2zReviewed

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    Publisher:Institute of Electronics, Information and Communication, Engineers, IEICE  

    In this paper, we propose a new structure for a compact matched filter bank (MFB) for an optical zero-correlation zone (ZCZ) sequence set with Zcz = 2z . The proposed MFB can reduces operation elements such as 2-input adders and delay elements. The number of 2-input adders decrease from O(N2) to O(N log2 N), delay elements decrease from O(N2) to O(N). In addition, the proposed MFBs for the sequence of length 32, 64, 128 and 256 with Zcz = 2
    4 and 8 are implemented on a field programmable gate array (FPGA). As a result, the numbers of logic elements (LEs) of the proposed MFBs for the sequences with Zcz = 2 of length 32, 64, 128 and 256 are suppressed to about 76.2%, 84.2%, 89.7% and 93.4% compared to that of the conventional MFBs, respectively.

    DOI: 10.1587/transfun.E101.A.195

    Scopus

  • Takahiro Matsumoto, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  BER performance of ss system using a human sequence against CW jamming .  IEICE Transactions on Fundamentals of Electronics, Communications and Computer SciencesE101A ( 1 ) 167 - 175   2018.1BER performance of ss system using a human sequence against CW jammingReviewed

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    Publisher:Institute of Electronics, Information and Communication, Engineers, IEICE  

    In this paper, we theoretically analyse the influence of intersymbol interference (ISI) and continuous wave interference (CWI) on the bit error rate (BER) performance of the spread spectrum (SS) system using a real-valued Human sequence under the additive white Gaussian noise (AWGN) environment. The aperiodic correlation function of the Human sequence has zero sidelobes except the shift-end values at the left and right ends of shift. The system can give the unified communication and ranging system because the output of a matched filter (MF) is the ideal impulse by generating transmitted signal of the bit duration T = NTc, N = 2n, n = 1
    2
    from the sequence of length M = 2kN + 1, k = 0
    1
    , where Tc is the chip duration and N is the spreading factor. As a result, the BER performance of the system is improved with decrease in the absolute value of the shift-end value, and is not influenced by ISI if the shift-end value is almost zero-value. In addition, the BER performance of the system of the bit duration T = NTc with CWI is improved with increase in the sequence length M = 2kN + 1, and the system can decrease the influence of CWI.

    DOI: 10.1587/transfun.E101.A.167

    Scopus

  • Naoya MUROKAWA, Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Iterative Equalization Based on Estimated Variance and Threshold for Massive MIMO with Spatial Modulation .  Proc. of the 2017 International Symposium on Nonlinear Theory and Its Applications (NOLTA2017)B2L ( E2 ) 538 - 541   2017.12Iterative Equalization Based on Estimated Variance and Threshold for Massive MIMO with Spatial ModulationReviewed

  • Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Compensation of Deteriorated CSI Allocation Based on Decision Direct and Turbo Equalization for MUDiv/OFDMA .  Proc. of the 2017 International Symposium on Nonlinear Theory and Its Applications (NOLTA2017)A3L ( A5 ) 209 - 212   2017.12Compensation of Deteriorated CSI Allocation Based on Decision Direct and Turbo Equalization for MUDiv/OFDMAReviewed

  • Kahori Ogashiwa, Takahiro Matsumoto, Yue Wang, Joji Kariya, Hiroo Naitoh .  Evaluation and Improvement of Yamaguchi University Self-Assessment and Evaluation System .  Proceedings - 2017 6th IIAI International Congress on Advanced Applied Informatics, IIAI-AAI 2017   218 - 220   2017.11Evaluation and Improvement of Yamaguchi University Self-Assessment and Evaluation SystemReviewed

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    Publisher:Institute of Electrical and Electronics Engineers Inc.  

    University evaluation is mandated by the School Education Act and the National University Cooperation Act. Universities are currently required to conduct self-assessments and improvements as university organizations. Yamaguchi University introduced Yamaguchi University Self-Assessment and Evaluation System (YUSE) before the incorporation of national universities, and the system has been in operation and under improvements for over ten years. The present paper reports improvements that have been made to the current self-assessment and evaluation system based on user requests. These improvements will provide useful information for improving evaluation systems at other universities. Moreover, it is possible for such improvements to be categorized into three frameworks that relate the systemic issues improved: system usability, links to other systems, and visualization functions (graphs) for analyses.

    DOI: 10.1109/IIAI-AAI.2017.134

    Scopus

  • Zeming Dong, Shinya Matsufuji, Yuta Ida, Takahiro Matsumoto .  A study on PAPR reduction in OFDM using complex hadamard matrices .  2017 8th International Workshop on Signal Design and Its Applications in Communications, IWSDA 2017   154 - 158   2017.11A study on PAPR reduction in OFDM using complex hadamard matricesReviewed

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    Publisher:Institute of Electrical and Electronics Engineers Inc.  

    In Orthogonal Frequency Division Multiplexing (OFDM) utilizing the fast Fourier transform (FFT) technique, a high Peak-to-Average-Power-Ratio (PAPR) appears at a transmitter and causes signal wave distortion due to the nonlinearity of the amplifier. Namely the system performance degrades and power consumption increases. In the proposed PAPR reduction techniques, there is an application of the discrete Fourier transform (DFT) which is not FFT, and the fast Hadamard transform (FHT) using a binary Hadamard matrix. This paper considers OFDM with FHT using a complex Hadamard matrix including a binary one applied to complex pseudo-random numbers. Their PAPR characteristic and Bit-Error-Rate (BER) performance are investigated in the view of the matrix order and the output phase-number, and the effectiveness of the complex Hadamard matrix is shown.

    DOI: 10.1109/IWSDA.2017.8097076

    Scopus

  • Pingzhi Fan, Tetsuya Kojima, Takahiro Matsumoto, Hideyuki Torii, Xiaohu Tang, Udaya Parampalli .  Preface .  2017 8th International Workshop on Signal Design and Its Applications in Communications, IWSDA 2017   2017.11PrefaceReviewed

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    Publisher:Institute of Electrical and Electronics Engineers Inc.  

    DOI: 10.1109/IWSDA.2017.8097087

    Scopus

  • Takahiro Matsumoto, Masanori Kurashita, Yasuaki Ohira, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  Influence of ISI on synchronous OCDMA system using an optical ZCZ sequence set on a diffuse channel .  2017 8th International Workshop on Signal Design and Its Applications in Communications, IWSDA 2017   159 - 163   2017.11Influence of ISI on synchronous OCDMA system using an optical ZCZ sequence set on a diffuse channelReviewed

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    Publisher:Institute of Electrical and Electronics Engineers Inc.  

    In this paper, we analyze the bit error rate (BER) performance of synchronous optical code division multiple access (OCDMA) system using an optical zero-correlation zone (ZCZ) sequence set over diffuse link by computer simulation, and evaluate the influence of inter-symbol interference (ISI) on the system. The optical ZCZ sequence set is a set of pairs of binary and bi-phase sequences with zero-correlation zone. As a result, the ISI can suppress by extension of zero-correlation zone.

    DOI: 10.1109/IWSDA.2017.8097077

    Scopus

  • Yuta Ida, Takahiro Matsumoto, Shinya Matsufuji .  Three hop AF relay transmissions for OFDM applying real and imaginary TFI pilot signals .  2017 8th International Workshop on Signal Design and Its Applications in Communications, IWSDA 2017   145 - 148   2017.11Three hop AF relay transmissions for OFDM applying real and imaginary TFI pilot signalsReviewed

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    Publisher:Institute of Electrical and Electronics Engineers Inc.  

    Multi-hop relay transmissions achieve high quality and vast area communications by using several relay nodes. For the relay method based on an amplify-and-forward (AF), channel estimation (CE) is only demanded in the destination node. In the single-hop AF relay transmission for orthogonal frequency division multiplexing (OFDM) systems, we have proposed the CE by using the pilot signal based on the time frequency interferometry (TFI). However, in the multi-hop AF relay transmission, the conventional TFI method degrades the system performance due to a null signal and the overlapped channel. To solve this problem, in this paper, we propose the CE based on the real and imaginary TFI pilot signals in the three hop AF relay transmission for OFDM systems.

    DOI: 10.1109/IWSDA.2017.8097074

    Scopus

  • Sho KURODA, Shinya MATSUFUJI, Yuta IDA, Takahiro MATSUMOTO .  High-Speed Synchronization Acquisition Methods of Quasi-Synchronous CDMA .  Journal of Signal Processing21 ( 6 ) 273 - 279   2017.11High-Speed Synchronization Acquisition Methods of Quasi-Synchronous CDMAReviewed

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  • Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Code Generator for an Optical ZCZ Sequence with Zero-Correlation Zone 2^z .  Journal of Signal Processing21 ( 6 ) 265 - 272   2017.11Code Generator for an Optical ZCZ Sequence with Zero-Correlation Zone 2^zReviewed

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  • Yuta IDA, Chang-Jun AHN, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Four Time Windows Averaging Channel Estimation With Real and Imaginary TFI Pilot Signals for OFDM .  IEICE Communications Express6 ( 10 ) 590 - 595   2017.10Four Time Windows Averaging Channel Estimation With Real and Imaginary TFI Pilot Signals for OFDMReviewed

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  • Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  A Generation Method of a Modified Mutually ZCZ Set of Optical Orthogonal Sequences .  Proc. of the 2017 International Workshop on Smart Info-Media Systems in Asia (SISA2017)   299 - 304   2017.9A Generation Method of a Modified Mutually ZCZ Set of Optical Orthogonal SequencesReviewed

  • Hiroshi AOKI, Takahiro MATSUMOTO, Tetsuya KOJIMA, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Study on Rotation Attack Tolerability of Digital Watermarking Based on Two-Dimensional Complementary Pairs .  Proc. of the 2017 International Workshop on Smart Info-Media Systems in Asia (SISA2017)   238 - 243   2017.9Study on Rotation Attack Tolerability of Digital Watermarking Based on Two-Dimensional Complementary PairsReviewed

  • Tomoaki HIROSAWA, Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Study on BER Performance of Optical Wireless Code-Shift Keying System Using Compact Matched Filter Bank for Optical ZCZ Sequence Set .  Proc. of the 2017 International Workshop on Smart Info-Media Systems in Asia (SISA2017)   244 - 248   2017.9Study on BER Performance of Optical Wireless Code-Shift Keying System Using Compact Matched Filter Bank for Optical ZCZ Sequence SetReviewed

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  • Sho ADACHI, Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Experimental Evaluation of Optical ZCZ-CDMA System on the Move .  Proc. of the 2017 International Workshop on Smart Info-Media Systems in Asia (SISA2017)   229 - 233   2017.9Experimental Evaluation of Optical ZCZ-CDMA System on the MoveReviewed

  • Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Construction of Code Generator for Optical ZCZ Sequence Used as Synchronization Symbol .  Proc. of the 2017 International Workshop on Smart Info-Media Systems in Asia (SISA2017)21 ( 6 ) 283 - 288   2017.9Construction of Code Generator for Optical ZCZ Sequence Used as Synchronization SymbolReviewed

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2299/jsp.21.265

  • Toma SAEKI, Shinya MATSUFUJI, Yuta IDA, Takahiro MATSUMOTO .  On Block Coding CDMA Using Bent ZCZ Codes .  Proc. of the 2017 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'17)   625 - 628   2017.3On Block Coding CDMA Using Bent ZCZ CodesReviewed

  • Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Interleaved MUDiv Block Allocation and Optimum Power Control for SC-FDMA .  Proc. of the 2017 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'17)   517 - 520   2017.3Interleaved MUDiv Block Allocation and Optimum Power Control for SC-FDMAReviewed

  • Akihiro KAMENO, Shinya MATSUFUJI, Yuta IDA, Takahiro MATSUMOTO, Takafumi HAYASHI .  Correlation Properties of Bent ZCZ Codes .  Proc. of the 2017 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'17)   513 - 516   2017.3Correlation Properties of Bent ZCZ CodesReviewed

  • Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Construction of a Code Generator for an Optical ZCZ Sequence with Zero-Correlation Zone 2^z .  Proc. of the 2017 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'17)   361 - 364   2017.3Construction of a Code Generator for an Optical ZCZ Sequence with Zero-Correlation Zone 2^zReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  A Generation Method of a Mutually ZCZ Set of Optical Orthogonal Sequences Consisting of Binary and Ternary Sequence Pairs .  Proc. of the 2017 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'17)   357 - 360   2017.3A Generation Method of a Mutually ZCZ Set of Optical Orthogonal Sequences Consisting of Binary and Ternary Sequence PairsReviewed

  • Yasuaki OHIRA, Kahori OGASHIWA, Satoshi MURANAGA, Takahiro MATSUMOTO, Hiroo NAITOH .  A Questionnaire System for Institutional Research .  Information Engineering Express3 ( 1 ) 9 - 18   2017.3A Questionnaire System for Institutional ResearchReviewed

  • Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Packet Splitting and Adaptive Modulation Based on Time Domain CSI for Cooperative OFDM Systems .  Proc. of the 2016 International Symposium on Nonlinear Theory and Its Applications (NOLTA2016)A2L ( G4 ) 99 - 102   2016.11Packet Splitting and Adaptive Modulation Based on Time Domain CSI for Cooperative OFDM SystemsReviewed

  • Yasuaki Ohira, Kahori Ogashiwa, Satoshi Muranaga, Takahiro Matsumoto, Hiroo Naitoh .  A Development of a Questionnaire System for Institutional Research .  PROCEEDINGS 2016 5TH IIAI INTERNATIONAL CONGRESS ON ADVANCED APPLIED INFORMATICS IIAI-AAI 20163 ( 1 ) 505 - 508   2016.7A Development of a Questionnaire System for Institutional ResearchReviewed

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    Publisher:IEEE  

    We have developed a web-based survey system cooperating with the authentication server of the university. This system has functions to enhance institutional research, such as displaying response rates by each departments of the university. The present study provides an overview and a case study of the use of this system.

    DOI: 10.1109/IIAI-AAI.2016.108

    DOI: 10.1109/IIAI-AAI.2016.108

    Web of Science

  • Hideyuki TORII, Takahiro MATSUMOTO, Makoto NAKAMURA .  New Optimal A-ZCZ Sequence Sets Including Uncorrelated Sequences .  Proc. of the 2016 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'16)   562 - 565   2016.3New Optimal A-ZCZ Sequence Sets Including Uncorrelated SequencesReviewed

  • Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Study on Construction of a Matched Filter Bank for an Optical ZCZ Sequence Set with Zero-Correlation Zone 2^z .  Proc. of the 2016 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'16)   363 - 366   2016.3Study on Construction of a Matched Filter Bank for an Optical ZCZ Sequence Set with Zero-Correlation Zone 2^zReviewed

  • Yuta Ida, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji .  Achievement Accurate CSI for AF Relay MIMO/OFDM Based on Complex HTRCI Pilot Signal with Enhanced MMSE Equalization .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE98A ( 11 ) 2254 - 2262   2015.11Achievement Accurate CSI for AF Relay MIMO/OFDM Based on Complex HTRCI Pilot Signal with Enhanced MMSE EqualizationReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    Amplify-and-forward (AF) relay multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems can achieve high data rate and high quality communications. On the other hand, it has to estimate all channels between the source-relay and relay-destination nodes in the destination node. In MIMO/OFDM systems, high time resolution carrier interferometry (HTRCI) has been proposed to achieve an accurate channel estimation (CE) with a small number of pilot signals. However, since it has many interferences, an accurate CE is not obtained and the system performance is degraded in AF relay MIMO/OFDM systems. Therefore, in this paper, we propose the complex HTRCI (C-HTRCI) pilot signal and the enhanced minimum mean square error (E-MMSE) equalization to achieve an accurate CE and to improve the system performance for AF relay MIMO/OFDM systems.

    DOI: 10.1587/transfun.E98.A.2254

    Web of Science

  • Yuta Ida, Kota Imafuku, Takahiro Matsumoto, Shinya Matsufuji .  Performance Evaluation for AF Relay TFI-OFDM Systems .  2015 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATION SYSTEMS (ISPACS) ( 3D-4 ) 548 - 551   2015.11Performance Evaluation for AF Relay TFI-OFDM SystemsReviewed

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    Publisher:IEEE  

    Amplify-and-forward (AF) relay transmissions can achieve a low power long distance communication. The problem of the AF method is that the channel state information (CSI) between source-relay (SR) and relay-destination (RD) should be obtained simultaneously in the destination node. The pilot signal is inserted to obtain the CSI, and the time frequency interferometry (TFI) method can reduce the number of pilot signals and the channel estimation (CE) power. This paper proposes the low power CE for AF relay transmissions in an orthogonal frequency division multiplexing based on the TFI method.

    DOI: 10.1109/ISPACS.2015.7432832

    DOI: 10.1109/ISPACS.2015.7432832

    Web of Science

  • Shinya Matsufuji, Takafumi Hayashi, Sho Kuroda, Yuta Ida, Takahiro Matsumoto .  On Bent ZCZ Codes .  2015 SEVENTH INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS (IWSDA)   196 - 199   2015.9On Bent ZCZ CodesReviewed

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    Publisher:IEEE  

    This paper discusses a set of sequences with a zero correlation zone such that their Fourier transform over GF(p) corresponding to the Hadamard transform over GF(p) takes only unit magnitude, called a bent ZCZ code. The constructions and properties of polyphase bent ZCZ codes of period p(n) including bi-phase and quadriphase ones are clarified.

    DOI: 10.1109/IWSDA.2015.7458403

    DOI: 10.1109/IWSDA.2015.7458403

    Web of Science

  • Sho Kuroda, Shinya Matsufuji, Yuta Ida, Takahiro Matsumoto .  On a Block Coding ZCZ-CDMA Scheme with High-Speed Processing .  2015 SEVENTH INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS (IWSDA)   200 - 204   2015.9On a Block Coding ZCZ-CDMA Scheme with High-Speed ProcessingReviewed

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    Publisher:IEEE  

    A quasi-synchronous CDMA scheme using a spreading code with a zero correlation zone called ZCZ code and a block cording technique with the Rake receiver with the pilot-symbol-aided channel estimation, which is called BC-ZCZ-CDMA, can almost remove the multiple access interference (MAl) and inter symbol interference (lSI) over multipass Rayleigh fading channel. In large delay spread with high-speed real-time transmission, it is necessary to increase the block size K in order to remove MAT and ISI. However the calculation of the inverse matrix in the Rake receiver takes time of the cube order of the block size corresponding to the number of data symbols transmitted in one bundle, i.e., O(K-3). This paper discusses BC-ZCZ-CDMA that L ZCZ sequences is assigned to a user, and investigates the bit error rate performance over a multipath Rayleigh fading channel. As final results, the number of users decreases, but the calculation time becomes O((K/L)(3)). Furthermore a pilot signal can be designed effectively, and the overall system will be simplified.

    DOI: 10.1109/IWSDA.2015.7458404

    DOI: 10.1109/IWSDA.2015.7458404

    Web of Science

  • Yuta Ida, Masanori Yofune, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji .  Estimation based on weighted channel variance for HTRCI-MIMO/OFDM with QRM-MLD and channel ranking under fast fading Channel .  TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES26 ( 7 ) 1050 - 1059   2015.7Estimation based on weighted channel variance for HTRCI-MIMO/OFDM with QRM-MLD and channel ranking under fast fading ChannelReviewed

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    Publisher:WILEY-BLACKWELL  

    To achieve more high-speed communication systems, multiple-input multiple-output orthogonal frequency division multiplexing (MIMO/OFDM) is adopted in several standardisations. On the other hand, the conventional MIMO/OFDM requires many pilot signals to estimate the channel state information (CSI). To achieve an accurate CSI with the small number of pilot signals, high time resolution carrier interferometry (HTRCI) for MIMO/OFDM has been proposed. Moreover, QR decomposition with M-algorithm maximum likelihood detection (QRM-MLD) and channel ranking has been proposed to achieve both the reducing complexity and the improving system performance. However, the conventional HTRCI-MIMO/OFDM with the QRM-MLD and channel ranking did not consider the problem of the fast fading channel. In the fast fading environment, many errors are caused in the last part of the packet. To overcome this problem, the decision-direct method has been proposed. However, it requires large complexity because of the iterative processing. Therefore, in this paper, we propose the non-linear prediction method for an HTRCI-MIMO/OFDM with the QRM-MLD and channel ranking. Copyright (c) 2014 John Wiley & Sons, Ltd.

    DOI: 10.1002/ett.2807

    Web of Science

  • Shinya MATSUFUJI, Keisuke SHIOZAKI, Takahiro MATSUMOTO, Yuta IDA .  A Digital Watermarking Scheme Using Reference Images .  Proc. of the 2015 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'15)   631 - 634   2015.2A Digital Watermarking Scheme Using Reference ImagesReviewed

  • Hideyuki TORII, Takahiro MATSUMOTO, Makoto NAKAMURA .  An Extension Method of the Periods of Generalized Mutually Orthogonal ZCZ Sequence Sets .  Proc. of the 2015 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'15)   389 - 392   2015.2An Extension Method of the Periods of Generalized Mutually Orthogonal ZCZ Sequence SetsReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI .  Theoretical Analysis of BER Performance of SS System Using a Huffman Sequence Against CW Jamming Over Rayleigh Fading Channels .  Proc. of the 2015 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'15)   134 - 137   2015.2Theoretical Analysis of BER Performance of SS System Using a Huffman Sequence Against CW Jamming Over Rayleigh Fading ChannelsReviewed

  • Takahiro Matsumoto, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  A Compact Matched Filter Bank for a Mutually Orthogonal ZCZ Sequence Set Consisting of Ternary Sequence Pairs .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE97A ( 12 ) 2595 - 2600   2014.12A Compact Matched Filter Bank for a Mutually Orthogonal ZCZ Sequence Set Consisting of Ternary Sequence PairsReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    In this paper, we propose a new structure for a compact matched filter bank for a mutually orthogonal zero-correlation zone (MO-ZCZ) sequence set consisting of ternary sequence pairs obtained by Hadamard and binary ZCZ sequence sets; this construction reduces the number of two-input adders and delay elements. The matched filter banks are implemented on a field-programmable gate array (FPGA) with 51,840 logic elements (LEs). The proposed matched filter bank for an MO-ZCZ sequence set of length 160 can be constructed by a circuit size that is about 8.6% that of a conventional matched filter bank.

    DOI: 10.1587/transfun.E97.A.2595

    Web of Science

  • Yuta Ida, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji .  Removing Deep Faded Subcarrier Channel for Cooperative Multiuser Diversity OFDMA Based on Low Granularity Block .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE97A ( 12 ) 2586 - 2594   2014.12Removing Deep Faded Subcarrier Channel for Cooperative Multiuser Diversity OFDMA Based on Low Granularity BlockReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    To achieve more high speed and high quality systems of wireless communications, orthogonal frequency division multiple access (OFDMA) has been proposed. Moreover, OFDMA considering the multiuser diversity (MUDiv) has been also proposed to achieve more high system performance. On the other hand, the conventional MUDiv/OFDMA requires large complexity to select the subcarrier of each user. To solve this problem, we have proposed a MUDiv/OFDMA based on the low granularity block (LGB). However, it degrades the system performance in the environment which contains many deep faded subcarrier channels. Therefore, in this paper, we propose a cooperative LGB-MUDiv/OFDMA to mitigate the influence due to the deep faded subcarrier channel.

    DOI: 10.1587/transfun.E97.A.2586

    Web of Science

  • Ainiwan Abudoukeremu, Shinya Matsufuji, Yuta Ida, Takahiro Matsumoto .  A Novel Multicarrier CDMA scheme with interference free performance in very large delay spread .  ITE Transactions on Media Technology and Applications2 ( 4 ) 362 - 369   2014.10A Novel Multicarrier CDMA scheme with interference free performance in very large delay spreadReviewed

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    Publisher:Institute of Image Information and Television Engineers  

    A wireless communication technology that allows multiple users to communicate in real time is strongly required to support various needs such as high performance remote control systems to simultaneously move many mobile units like robots and vehicles and wireless network systems to dynamically link mobile units. This paper proposes a new multicarrier code division multiple access (MC-CDMA) scheme without the multiple access interference (MAI) and inter carrier interference (ICI) over a very large delay spread channel, which can be characterized by a block coding technique using a set of sequences with a zero correlation zone (ZCZ code) and a minimum mean square error (MMSE) RAKE receiver utilizing the pilot sequence for channel estimation to remove MAI and ICI and to reduce the influence of the inter symbol interference (ISI), respectively. It does not need a frequency domain equalization technique which has been used in multicarrier communications. The length of delay spread is related to only block size and does not depend on the size of the zero correlation zone and the number of users. In various parameters including an effective ZCZ code, the improved bit error rate (BER) performance of the proposed scheme is demonstrated by computer simulation.

    DOI: 10.3169/mta.2.362

    DOI: 10.3169/mta.2.362

    Scopus

  • Takahiro Matsumoto, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  Study on BER Performance of SS System Using a Huffman Sequence Against CW Jamming Over AWGN Channels .  2014 INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY AND ITS APPLICATIONS (ISITA)   595 - 599   2014.10Study on BER Performance of SS System Using a Huffman Sequence Against CW Jamming Over AWGN ChannelsReviewed

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    Publisher:IEEE  

    In this paper, we evaluate the influence by a continuous wave (CW) interference on the bit error rate (BER) performance of the spread spectrum (SS) system using a real-valued Huffman sequence under the additive white Gaussian noise (AWGN) environment. The aperiodic correlation function of the sequence has zero sidelobes except at the left and right shift-ends. The system can give the unified communication and ranging system because the output of a matched filter (MF) is the ideal impulse by generating transmitted signal of period N from the sequence of length M = 2(k) N + 1, k is nonnegative integer. As a result, the BER performance of the system under the AWGN and CW interference environment is improved with increase in the sequence length M.

    Web of Science

  • Yuta Ida, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji .  Performance Enhancement for AF Relay MIMO/OFDM with Complex HTRCI Pilot Signal .  PROCEEDINGS OF THE 20TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC2014) ( F3B-1 ) 325 - 330   2014.10Performance Enhancement for AF Relay MIMO/OFDM with Complex HTRCI Pilot SignalReviewed

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    Publisher:IEEE  

    Recently, amplify-and-forward (AF) multiple-input multiple-output (MIMO) relay transmissions are studied to achieve high quality communications. On the other hand, they have to estimate all channels between the source-relay and relay destination nodes in the receiver. In MIMO orthogonal frequency division multiplexing (OFDM) systems, high time resolution carrier interferometry (HTRCI) has been proposed to achieve an accurate channel estimation (CE) with a small number of pilot signals. However, the conventional HTRCI-MIMO/OFDM is not adopted in AF relay transmissions. Therefore, in this paper, we propose the complex HTRCI (C-HTRCI) pilot signal to achieve an accurate CE for AF relay MIMO/OFDM systems.

    Web of Science

  • Ainiwan Abudoukeremu, Jincheng Huang, Yuta Ida, Takahiro Matsumoto, Shinya Matsufuji .  On BER Performance of Block Coding MC-ZCZ-CDMA .  2014 INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY AND ITS APPLICATIONS (ISITA)   516 - 520   2014.10Reviewed

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    Publisher:IEEE  

    This paper clarifies the bit error rate (BER) performance of a new multicarrier code division multiple access (MC-CDMA) scheme without the multiple access interference (MAI) and inter carrier interference (ICI) over a very large delay spread channel, which can be characterized by a block coding technique using a set of sequences with a zero correlation zone (ZCZ code) and the minimum mean square error (MMSE) Rake receiver with a pilot-symbol-aided channel estimation to remove MAI and ICI, and to reduce the influence of the inter symbol interference (ISI), respectively. It is not necesseary to use the frequency domain equalization technique which has been always applied in multicarrier communications. The length of delay chips is related to only block size and does not depend on the size of the zero correlation zone and the number of users.

    Web of Science

  • Takahiro Matsumoto, Yasuaki Ohira, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  Study on BER Performance of Atmospheric Optical ZCZ-CDMA System Using Equal Gain Combining .  Proc. of the 2014 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'14)   521 - 524   2014.3Study on BER Performance of Atmospheric Optical ZCZ-CDMA System Using Equal Gain CombiningReviewed

  • Hideyuki Torii, Daichi Kawasaki, Takahiro Matsumoto, Makoto, Nakamura .  Zero-Cross-Correlation Properties of Generalized Mutually Orthogonal ZCZ Sequence Sets .  Proc. of the 2014 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'14)   157 - 160   2014.3Zero-Cross-Correlation Properties of Generalized Mutually Orthogonal ZCZ Sequence SetsReviewed

  • Takahiro Matsumoto, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  BER Performance of ASK-SS and M-ary/ASK-SS Systems Using Compact Matched Filter Bank for an Optical ZCZ Code with Zero-Correlation Zone 4n-2 .  Journal of Signal Processing17 ( 6 ) 265 - 271   2013.11BER Performance of ASK-SS and M-ary/ASK-SS Systems Using Compact Matched Filter Bank for an Optical ZCZ Code with Zero-Correlation Zone 4n-2Reviewed

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  • Hideyuki Torii, Takahiro Matsumoto, Makoto Nakamura .  Extension of Methods for Constructing Polyphase Asymmetric ZCZ Sequence Sets .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE96A ( 11 ) 2244 - 2252   2013.11Extension of Methods for Constructing Polyphase Asymmetric ZCZ Sequence SetsReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    The present paper proposes two new methods for constructing polyphase asymmetric zero-correlation zone (A-ZCZ) sequence sets. In previous studies, the authors proposed methods for constructing quasi-optimal polyphase A-ZCZ sequence sets using perfect sequences and for constructing optimal polyphase A-ZCZ sequence sets using discrete Fourier transform (DFT) matrices. However, in these methods, the total number of sequences in an A-ZCZ sequence set cannot exceed the period of the perfect sequence or the dimension of the DFT matrix used for constructing the A-ZCZ sequence set. We now propose two extended versions of these methods. The proposed methods can generate a quasi-optimal or optimal polyphase A-ZCZ sequence set where the total number of sequences exceeds the period of the perfect sequence or the dimension of the DFT matrix. In other words, the proposed methods can generate new A-ZCZ sequence sets that cannot be obtained from the known methods.

    DOI: 10.1587/transfun.E96.A.2244

    Web of Science

  • Ainiwan Abudoukeremu, Yuta Ida, Takahiro Matsumoto, Shinya Matsufuji .  Multicarrier Transmission Systems With Spreading Sequences in Large Delay Spread Channel .  SIXTH INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS   80 - 83   2013.10Multicarrier Transmission Systems With Spreading Sequences in Large Delay Spread ChannelReviewed

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    Publisher:IEEE  

    In multi-carrier transmission systems, MC-CDMA and MC-DS-CDMA have been proposed. However, when large delay spread is longer than guard interval (GI), the inter symbol interference (ISI) and inter carrier interference (ICI) are occurred. Their interferences cause the system performance deterioration. This paper treats MC-CDMA and MC-DS-CDMA with four kinds of orthogonal spreading sequence including even-shift orthogonal sequences (E-sequence) type zero correlation zone (E-ZCZ) code in large delay spread channel. Moreover, interleaving method is considered in MC-DS-CDMA. Finally, the bit error rate (BER) performance is evaluated by computer simulation.

    DOI: 10.1109/IWSDA.2013.6849067

    DOI: 10.1109/IWSDA.2013.6849067

    Web of Science

  • Akinori Ueganna, Sho Kuroda, Yuta Ida, Takahiro Matsumoto, Shinya Matsufuji .  On Fast Synchronization Acquisition of ZCZ-CDMA .  SIXTH INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS   76 - 79   2013.10On Fast Synchronization Acquisition of ZCZ-CDMAReviewed

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    Publisher:IEEE  

    ZCZ-CDMA operating under quasi-synchronous timing control and using zero correlation zone (ZCZ) code possesses interference free performance and fast frame acquisition. This paper discusses fast synchronization acquisition methods using a matched filter bank, which simultaneously calculates correlation between a received signal and any sequence in ZCZ code, and the effectiveness is shown from synchronization error rates (SER) on the AWGN and Rayleigh fading channels.

    DOI: 10.1109/IWSDA.2013.6849066

    DOI: 10.1109/IWSDA.2013.6849066

    Web of Science

  • Yuta Ida, Masanori Yofune, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji .  Non-linear Fast Fading Compensation for HTRCI-MIMO/OFDM with QRM-MLD and Channel Ranking .  SIXTH INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS   130 - 133   2013.10Non-linear Fast Fading Compensation for HTRCI-MIMO/OFDM with QRM-MLD and Channel RankingReviewed

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    Publisher:IEEE  

    In multiple-input multiple-output orthogonal frequency division multiplexing (MIMO/OFDM) systems, large complexity is considerable work. To mitigate this problem, high time resolution carrier interferometry (HTRCI) for MIMO/OFDM applying QR decomposition with M algorithm maximum likelihood detection (QRM-MLD) and channel ranking has been proposed. In the fast fading environment, since many errors are occurred in the last part of the packet, the decision direct method has been proposed. However, it requires also large complexity. Therefore, in this paper, we propose the non-linear prediction method for a HTRCI-MIMO/OFDM with QRM-MLD and channel ranking.

    DOI: 10.1109/IWSDA.2013.6849080

    DOI: 10.1109/IWSDA.2013.6849080

    Web of Science

  • Takahiro Matsumoto, Takashi Sugimoto, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  Theoretical Analysis of BER Performance of Spread Spectrum System Using a Huffman Sequence Over Rayleigh Fading Channels .  SIXTH INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS   60 - 63   2013.10Theoretical Analysis of BER Performance of Spread Spectrum System Using a Huffman Sequence Over Rayleigh Fading ChannelsReviewed

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    Publisher:IEEE  

    In this paper, we theoretically analyse the influence by intersymbol interference (ISI) on the bit error rate (BER) performance of the spread spectrum (SS) system using a real-valued Huffman sequence whose aperiodic correlation function has zero sidelobes except at the left and right shift-ends, under the quasi-static Rayleigh fading environment. The system can give the unified communication and ranging system because the output of a matched filter (MF) is the ideal impulse by overlap of 1 chip. As a result, the BER performance of the system under the quasi-static Rayleigh fading environment is improved with decrease in the absolute value of the shift-end value, is not influenced by ISI if the shift-end value is almost zero-value.

    DOI: 10.1109/IWSDA.2013.6849062

    DOI: 10.1109/IWSDA.2013.6849062

    Web of Science

  • Takahiro Matsumoto, Yasuaki Ohira, Satoshi Muranaga, Hideyuki Torri, Yuta Ida, Shinya Matsufuji .  Trial of Free-Space Parallel Transmission System Based on Optical ZCZ-CDMA System .  SIXTH INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS   84 - 87   2013.10Trial of Free-Space Parallel Transmission System Based on Optical ZCZ-CDMA SystemReviewed

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    Publisher:IEEE  

    In this paper, we manufacture the parallel transmission system consisting of an infrared light emitting diode (LED), an avalanche photo diode (APD) module and a field programmable gate array (FPGA) board corresponding to 132, 540 logic elements (LEs) by way of trial, and evaluate the BER performance of the optical ZCZ-CDMA system with the equal gain combining (EGC) by the indoor experiment. As a result of indoor experiment with the parallel transmission system, BER performance improves with an increase in number of received APD by the EGC.

    DOI: 10.1109/IWSDA.2013.6849068

    DOI: 10.1109/IWSDA.2013.6849068

    Web of Science

  • Takahiro Matsumoto, Takashi Sugimoto, Hideyuki Torii, Yuta Ida, Shinya Matsufuji .  Theoretical Analysis of BER Performance of Spread Spectrum System Using a Huffman Sequence Over AWGN Channels .  Proc. of the 2013 International Workshop on Smart Info-Media Systems in Asia (SISA2013)   27 - 31   2013.9Theoretical Analysis of BER Performance of Spread Spectrum System Using a Huffman Sequence Over AWGN ChannelsReviewed

  • Hideyuki TORII, Masaaki SATOH, Takahiro MATSUMOTO, Makoto NAKAMURA .  Quasi-Optimal and Optimal Generalized Mutually Orthogonal ZCZ Sequence Sets Based on an Interleaving Technique .  International Journal of Communications1 ( 7 ) 18 - 25   2013.5Quasi-Optimal and Optimal Generalized Mutually Orthogonal ZCZ Sequence Sets Based on an Interleaving TechniqueReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Shinya MATSUFUJI .  Theoretical Analysis of BER Performance of Optical ZCZ-CDMA System .  International Journal of Computers and Communications1 ( 7 ) 18 - 25   2013.5Theoretical Analysis of BER Performance of Optical ZCZ-CDMA SystemReviewed

  • Yuta Ida, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji .  Mitigated deep faded channel with relay node allocation for MUDiv/OFDMA .  2013 19th Asia-Pacific Conference on Communications, APCC 2013   6 - 11   2013.4Mitigated deep faded channel with relay node allocation for MUDiv/OFDMAReviewed

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    Publisher:IEEE Computer Society  

    In recent, to achieve several services with the information product, high speed and high quality systems of wireless communications are demanded. To achieve this demand, orthogonal frequency division multiple access (OFDMA) has been proposed. In a wireless network, the transmitted signal of each user has independent channel fluctuation characteristics. By using this characteristic, the multiuser diversity (MUDiv) effect can be obtained, and MUDiv/OFDMA has been proposed. Before now, we have proposed a low complexity MUDiv/OFDMA. However, it degrades the system performance compared with the conventional MUDiv/OFDMA in the channel as a Pyramid model. To solve this problem, in this paper, we propose the method to mitigate the deep faded channel for a low complexity MUDiv/OFDMA with the relay node allocation. © 2013 IEEE.

    DOI: 10.1109/APCC.2013.6765906

    DOI: 10.1109/APCC.2013.6765906

    Scopus

  • Hideyuki Torii, Masaaki Satoh, Takahiro Matsumoto, Makoto Nakamura .  Generalized Mutually Orthogonal ZCZ Sequence Sets Based on Perfect Sequences and Orthogonal Codes .  Proc. of the 15th International Conference on Advanced Communication Technology (ICACT2013)   894 - 899   2013.1Generalized Mutually Orthogonal ZCZ Sequence Sets Based on Perfect Sequences and Orthogonal CodesReviewed

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    Publisher:IEEE  

    The present paper proposes a new method for constructing mutually orthogonal zero-correlation zone (MO-ZCZ) sequence sets using perfect sequences, orthogonal codes, and an interleaving technique. Generally, an MO-ZCZ sequence set is composed of several ZCZ sequence sets, and two arbitrary sequences that belong to different ZCZ sequence sets have orthogonality. Each ZCZ sequence set included in the proposed MO-ZCZ sequence set is a quasi-optimal ZCZ sequence set. In addition, two arbitrary sequences that belong to different ZCZ sequence sets have not only orthogonality but also a zero-correlation zone of which the ZCZ length satisfies quasi-optimality. Consequently, the proposed MO-ZCZ sequence set can be regarded as a single quasi-optimal ZCZ sequence set. In this sense, the proposed MO-ZCZ sequence set can be regarded as a generalized version of conventional MO-ZCZ sequence sets.

    Web of Science

  • Ainiwan Abudoukeremu, Shinya Matsufuji, Takahiro Matsumoto .  On Optical ZCZ Codes With a Good Aperiodic Autocorrelation Property .  Proc. of the 15th International Conference on Advanced Communication Technology (ICACT2013)   586 - 589   2013.1On Optical ZCZ Codes With a Good Aperiodic Autocorrelation PropertyReviewed

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    Publisher:IEEE  

    A quasi-synchronous optical code division multiple access (OCDMA) system, which uses a set of pairs of binary and bi-phase sequences with a zero correlation zone (Zcz) called an optical ZCZ (O-ZCZ) code as a spreading code, can efficiently mitigate multiple access interferences (MAI). This paper presents O-ZCZ codes of length 2(n+1) with the minimum zero correlation zone Zcz=1, which possess a low aperiodic autocorrelation property. They are derived from complementary sequence pairs of length 2(n) that the sum of these aperiodic autocorrelation functions take zero except zero-shift.

    Web of Science

  • Takahiro MATSUMOTO, Takahiro NISHIKAWA, Hideyuki TORII, Shinya MATSUFUJI .  Matched Filter Bank Implementation on FPGA for a Mutually Orthogonal Set of ZCZ Codes Using Hadamard and ZCZ Codes .  Proc. of the 15th International Conference on Advanced Communication Technology (ICACT2013)   764 - 767   2013.1Matched Filter Bank Implementation on FPGA for a Mutually Orthogonal Set of ZCZ Codes Using Hadamard and ZCZ CodesReviewed

  • Hideyuki TORII, Masaaki SATOH, Takahiro MATSUMOTO, Makoto NAKAMURA .  New Generalized Mutually Orthogonal ZCZ Sequence Sets Constructed from DFT Matrices .  Proc. of the 3rd European Conference of Communications (ECCOM'12)   262 - 267   2012.12New Generalized Mutually Orthogonal ZCZ Sequence Sets Constructed from DFT MatricesReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Shinya MATSUFUJI .  Comparison of Optical ZCZ-CDMA System with Zero Correlation Zone 4n ? 2 by Electrical and Optical Processing .  Proc. of the 3rd European Conference of Communications (ECCOM'12)   268 - 273   2012.12Comparison of Optical ZCZ-CDMA System with Zero Correlation Zone 4n ? 2 by Electrical and Optical ProcessingReviewed

  • Jincheng Huang, Shinya Matsufuji, Takahiro Matsumoto, Noriyoshi Kuroyanagi .  A ZCZ-CDMA system with BFSK modulation .  INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS25 ( 12 ) 1620 - 1638   2012.12A ZCZ-CDMA system with BFSK modulationReviewed

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    Publisher:WILEY-BLACKWELL  

    A quasi-timing synchronous code division multiple access (CDMA) system called ZCZ-CDMA, which uses a set of sequences with a zero-correlation zone called ZCZ code as a spreading code, is useful for short-range wireless communications because of its excellent properties such as co-channel interference-free performance, simplified hardware design, and low transmit power as well as fast frame synchronization capability. In this paper, a ZCZ-CDMA system with binary frequency-shift keying (BFSK) modulation called BFSK-ZCZ-CDMA is proposed. This system is characterized by using a pair of balanced ZCZ codes for spreading and transmitting the two spread components over the respective keying carrier frequencies. Its bit error rate performance, compared with those of existing BPSK-ZCZ-CDMA, ASK-ZCZ-CDMA, and CDMA systems using the other spreading codes, is evaluated in theory and simulation. The bit error rate performance of the three ZCZ-CDMA systems over additive white Gaussian noise and Rayleigh fading channels are formulated. It is proved that BFSK-ZCZ-CDMA is much more robust in anti-fading performance and low transmit power in such an environment that fading distributions on the keying frequencies are independent mutually. Fading versus frequency characteristics are also investigated. Copyright (c) 2012 John Wiley & Sons, Ltd.

    DOI: 10.1002/dac.2313

    Web of Science

  • Tomohiro HAYASHIDA, Shinya MATSUFUJI, Takahiro MATSUMOTO, Pingzhi FAN .  Construction of ZCZ Codes With Low Aperiodic Autocorrelation .  Journal of Signal Processing16 ( 6 ) 477 - 485   2012.11Reviewed

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  • Hideyuki TORII, Takahiro MATSUMOTO, Makoto NAKAMURA .  Optimal Polyphase Asymmetric ZCZ Sequence Sets Including Uncorrelated Sequences .  Journal of Signal Processing16 ( 6 ) 487 - 494   2012.11Reviewed

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  • Shinya Matsufuji, Takahiro Matsumoto, Pingzhi Fan .  Even-Shift Orthogonal Arrays .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE95A ( 11 ) 1937 - 1940   2012.11Reviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    The even-shift orthogonal sequence whose out-of-phase aperiodic autocorrelation function takes zero at any even shifts is generalized to multi-dimension called even-shift orthogonal array (E-array), and the logic function of E-array of power-of-two length is clarified. It is shown that E-array can be constructed by complementary arrays, which mean pairs of arrays that the sum of each aperiodic autocorrelation function at the same phase shifts takes zero at any shift except zero shift, as well as the one-dimensional case. It is also shown that the number of mates of E-array with which the cross correlation function between E-arrays takes zero at any even shifts is equal to the dimension. Furthermore it is investigated that E-array possesses good aperiodic autocorrelation that the rate of zero correlation values to array length approaches one as the dimension becomes large.

    DOI: 10.1587/transfun.E95.A.1937

    Web of Science

  • Takahiro Matsumoto, Hideyuki Torii, Shinya Matsufuji .  Theoretical Analysis of BER Performance of Optical ZCZ-CDMA System With Smallest Zero Correlation Zone Using Optical Correlator .  IEEE INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATIONS SYSTEMS (ISPACS 2012)   549 - 552   2012.11Theoretical Analysis of BER Performance of Optical ZCZ-CDMA System With Smallest Zero Correlation Zone Using Optical CorrelatorReviewed

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    Publisher:IEEE  

    In this paper, we analyze the bit error rate (BER) performance of optical code division multiple access (CDMA) system based on the optical zero-correlation zone (ZCZ) code using the optical correlator which is called optical ZCZ-CDMA system, over the optical fiber and space by theoretical formula. In the optical fiber transmission of this system, the effect of the avalanche photodiode (APD) noise, thermal noise and co-channel interference are considered. Additionally, the effects of the scintillation and background noise are considered in the optical space transmission of this system. The optical ZCZ code, which is a set of pairs of a binary sequence consisting of 1 or 0 and a biphase sequence consisting of 1 or -1 with zero-correlation zone, may be able to provide optical CDMA communication system suppressed co-channel interference. As a result, the BER performance of optical ZCZ-CDMA system over the optical space go down compared to that over the optical fiber, and this system can't remove completely co-channel interference.

    DOI: 10.1109/ISPACS.2012.6473550

    DOI: 10.1109/ISPACS.2012.6473550

    Web of Science

  • Kosuke Omata, Hideyuki Torii, Takahiro Matsumoto .  Zero-Cross-Correlation Properties of Asymmetric ZCZ Sequence Sets .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE95A ( 11 ) 1926 - 1930   2012.11Zero-Cross-Correlation Properties of Asymmetric ZCZ Sequence SetsReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    Recently, asymmetric zero-correlation zone (A-ZCZ) sequence sets that are composed of several sequence subsets have been proposed. In A-ZCZ sequence sets, the zero-cross-con-elation zone (ZCCZ) length between different sequence subsets is larger than the zero-correlation zone (ZCZ) length in each sequence subset. However, the ZCCZ length between different sequence subsets was not precisely shown in previous studies. The present letter shows precisely the ZCCZ length between different sequence subsets. This information is useful for estimating the magnitude of inter-cell interference when designing approximately synchronized code-division multiple-access (AS-CDMA) systems.

    DOI: 10.1587/transfun.E95.A.1926

    Web of Science

  • Yoshihiko Ichikawa, Kahori Ogashiwa, Motoyuki Suzuki, Takahiro Matsumoto, Hiroo Naitoh .  An Overview of YUSE Yamaguchi University Self-Evaluation System in Relation to University Self-Evaluation Activities in the First Mid-Term Goals Period and the First Half of the Second Period .  Journal for Academic Computing and Networking16   3 - 14   2012.9Reviewed

  • Hideyuki Torii, Takahiro Matsumoto, Makoto Nakamura .  A New Method for Constructing Asymmetric ZCZ Sequence Sets .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE95A ( 9 ) 1577 - 1586   2012.9A New Method for Constructing Asymmetric ZCZ Sequence SetsReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    The present paper proposes a new method for constructing polyphase asymmetric zero-correlation zone (A-ZCZ) sequence sets. The proposed method can generate A-ZCZ sequence sets that cannot be obtained from methods proposed by other researchers and is a generalized version of our previously proposed method. An A-ZCZ sequence set can be regarded as a ZCZ sequence set. The newly obtained A-ZCZ sequence sets include quasi-optimal ZCZ sequence sets of which the zero-cross-correlation zone (ZCCZ) length between different sequence subsets is larger than the mathematical upper bound of conventional ZCZ sequence sets. A new method for extending the A-ZCZ sequence sets is also presented in the present paper.

    DOI: 10.1587/transfun.E95.A.1577

    Web of Science

  • Hideyuki TORII, Takahiro MATSUMOTO, Makoto, NAKAMURA .  New Asymmetric ZCZ Sequence Sets Based on DFT Matrices .  Proc. of the 2012 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'12)   792 - 795   2012.3New Asymmetric ZCZ Sequence Sets Based on DFT MatricesReviewed

  • Takahiro MATSUMOTO, Mika, INOUE, Hideyuki TORII, Shinya MATSUFUJI .  Study on BER Performance of Atmospheric Optical CDMA System Using Optical ZCZ Code .  Proc. of the 2012 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'12)   210 - 213   2012.3Study on BER Performance of Atmospheric Optical CDMA System Using Optical ZCZ CodeReviewed

  • Takahiro MATSUMOTO, Hideyuki TORII, Shinya MATSUFUJI .  Fast Periodic Auto and Cross Correlation Algorithms for an Orthogonal Set of Real-Valued Perfect Sequences from the Huffman Sequence .  International Journal of Circuits, Systems and Signal Processing6 ( 1 ) 87 - 96   2012.2Reviewed

  • Takahiro Matsumoto, Shinya Matsufuji, Tetsuya Kojima, Udaya Parampalli .  Orthogonal and ZCZ Sets of Real-Valued Periodic Orthogonal Sequences from Huffman Sequences .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE94A ( 12 ) 2728 - 2736   2011.12Orthogonal and ZCZ Sets of Real-Valued Periodic Orthogonal Sequences from Huffman SequencesReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    This paper presents a method of generating sets of orthogonal and zero-correlation zone (ZCZ) periodic real-valued sequences of period 2(n), n >= 1. The sequences admit a fast correlation algorithm and the sets of sequences achieve the upper bound on family size. A periodic orthogonal sequence has the periodic autocorrelation function with zero sidelobes, and a set with orthogonal sequences whose mutual periodic crosscorrelation function at zero shift is zero. Similarly, a ZCZ set is the set of the sequences with zero-correlation zone. In this paper, we derive the real-valued periodic orthogonal sequences of period 2" from a real-valued Huffman sequence of length 2(v) + 1, v being a positive integer and v >= n, whose aperiodic autocorrelation function has zero sidelobes except possibly at the left and right shift-ends. The orthogonal and ZCZ sets of real-valued periodic orthogonal sequences are useful in various systems, such as synchronous code division multiple access (CDMA) systems, quasi-synchronous CDMA systems and digital watermarkings.

    DOI: 10.1587/transfun.E94.A.2728

    Web of Science

  • Takahiro MATSUMOTO, Hideyuki TORII, Shinya MATSUFUJI .  Theoretical Analysis of BER Performance in ASK-SS and M-ary/ASK-SS Systems Using Compact Matched Filter Bank for an Optical ZCZ Code Over Rayleigh Fading Channels .  Proc. of the 2011 International Workshop on Smart Info-Media Systems in Asia (SISA2011)   171 - 175   2011.11Theoretical Analysis of BER Performance in ASK-SS and M-ary/ASK-SS Systems Using Compact Matched Filter Bank for an Optical ZCZ Code Over Rayleigh Fading ChannelsReviewed

  • Shinya Matsufuji, Takahiro Matsumoto, Takahide Matsuo, Noriyoshi Kuroyanagi .  A ZCZ-CDMA system with high tolerance to frequency selective fading .  Proceedings of the 5th International Workshop on Signal Design and Its Applications in Communications, IWSDA'11   157 - 160   2011.10A ZCZ-CDMA system with high tolerance to frequency selective fadingReviewed

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    A Quasi-synchronous CDMA system using a ZCZ code called a ZCZ-CDMA system can remove co-channel interferences, simplify hardware design, and achieve fast (less latency) transmission, due to enhancement in Frame synchronization techniques. Inter-symbol interference and co-channel interference appearing in frequency-selective Rayleigh fading channels influence the bit error rate performance. This paper proposes a ZCZ-CDMA system with block coding and channel estimation techniques to improve the performance. © 2011 IEEE.

    DOI: 10.1109/IWSDA.2011.6159413

    DOI: 10.1109/IWSDA.2011.6159413

    Scopus

  • Takahiro Matsumoto, Shinya Matsufuji .  Theoretical analysis of BER performance in ASK-SS and M-ary/ASK-SS systems using compact matched filter bank for an optical ZCZ code over AWGN channels .  Proceedings of the 5th International Workshop on Signal Design and Its Applications in Communications, IWSDA'11   161 - 164   2011.10Theoretical analysis of BER performance in ASK-SS and M-ary/ASK-SS systems using compact matched filter bank for an optical ZCZ code over AWGN channelsReviewed

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    The optical ZCZ code, which is a set of pairs of binary and biphase sequences with zero correlation zone, can provide code division multiple access (CDMA) communication system without co-channel interference. The M-ary amplitude shift keying spread spectrum (M-ary/ASK-SS) system using this code can detect a desired sequence without interference of undesired sequences. We have proposed the compact construction of a matched filter bank for this code, which is called the compact-type matched filter bank. However, M-ary/ASK-SS system using this filter bank might go down the bit error rate (BER) performance because input-output characteristics of this filter bank for this code with zero correlation zone 4n-2 are nonlinear characteristics. In this paper, we clarify that BER performance in the M-ary/ASK-SS system over the additive white Gaussian noise (AWGN) channels is not influenced by nonlinear characteristics of this filter bank by the theoretical formula of BER characteristics and the computer simulation. The BER performance in the ASK-SS system using compact-type matched filter under the AWGN environment go down compared to that using direct-type matched filter as expected. But the BER performance in the M-ary/ASK-SS system using this compact-type matched filter bank under the AWGN environment is almost equal compared to that using parallel-type matched filter bank. In fact, this compact-type matched filter bank is effective in the M-ary/ASK-SS system. © 2011 IEEE.

    DOI: 10.1109/IWSDA.2011.6159414

    DOI: 10.1109/IWSDA.2011.6159414

    Scopus

  • Tetsuya Kojima, Naoki Ohtani, Takahiro Matsumoto, Udaya Parampalli .  On multiple information embedding by digital watermarking based on complete complementary codes .  Proceedings of the 5th International Workshop on Signal Design and Its Applications in Communications, IWSDA'11   100 - 103   2011.10On multiple information embedding by digital watermarking based on complete complementary codesReviewed

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    It has been shown that complete complementary codes can be applied into CDMA communication systems because of its good correlation properties. A digital watermarking scheme using complete complementary codes has also been proposed. In this watermarking scheme, it is possible to embed the multiple secret data in a single image at the same time, but the effectiveness and the limit of the method has not been fully explored. In this study, the properties of the watermarking method are analyzed when the multiple secret ID's are embedded into a single image simultaneously. The paper also includes the discussion on the extension to a kind of steganography. © 2011 IEEE.

    DOI: 10.1109/IWSDA.2011.6159397

    DOI: 10.1109/IWSDA.2011.6159397

    Scopus

  • Takahiro MATSUMOTO, Hideyuki TORII, Shinya MATSUFUJI .  Fast Correlation Algorithm for an Orthogonal Set of Real-Valued Perfect Sequences from the Huffman Sequences .  Proc. of the 11th International Conference on Applied Computer Science (ACS '11)   146 - 151   2011.10Fast Correlation Algorithm for an Orthogonal Set of Real-Valued Perfect Sequences from the Huffman SequencesReviewed

  • Takayuki HIRANO, Shinya MATSUFUJI, Takahiro MATSUMOTO .  Transmission Characteristics of Grid-Shaped Networks on Ad-Hoc Wireless Sensor Networks .  Proc. of the 11th International Conference on Applied Computer Science (ACS '11)   140 - 145   2011.10Transmission Characteristics of Grid-Shaped Networks on Ad-Hoc Wireless Sensor NetworksReviewed

  • Koichi TAKIMOTO, Fusanori MIURA, Takahiro MATSUMOTO, Yuzuru SEKIHARA, Yoshinori KUMITA, Shingo YAMAMOTO .  Development of Distributed Autonomous Cooperative Evacuation Guidance System .  SOCIOTECHNICA ( 8 ) 82 - 90   2011.4Development of Distributed Autonomous Cooperative Evacuation Guidance SystemReviewed

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  • Takahiro MATSUMOTO, Shinya MATSUFUJI, Tetsuya KOJIMA, Udaya PARAMPALLI .  A Generation Method of a ZCZ Set of Real-Valued Periodic Orthogonal Sequences from Huffman Sequences .  Proc. of the 2011 2nd International Conference on Innovative Computing and Communication and 2011 Asia-Pacific Conference on Information Technology and Ocean Engineering (CICC-ITOE2011)2   266 - 269   2011.3A Generation Method of a ZCZ Set of Real-Valued Periodic Orthogonal Sequences from Huffman SequencesReviewed

  • Ainiwan ABUDOUKEREMU, Shinya MATSUFUJI, Takahiro MATSUMOTO .  On Spreading Sequences for ASK/SS Systems .  Proc. of the 2011 2nd International Conference on Innovative Computing and Communication and 2011 Asia-Pacific Conference on Information Technology and Ocean Engineering (CICC-ITOE2011)2   366 - 369   2011.3On Spreading Sequences for ASK/SS SystemsReviewed

  • Tomohiro HAYASHIDA, Shinya MATSUFUJI, Takahiro MATSUMOTO, Pingzhi FAN .  Binary ZCZ Codes With a Good Aperiodic Autocorrelation Property .  Proc. of the 2011 2nd International Conference on Innovative Computing and Communication and 2011 Asia-Pacific Conference on Information Technology and Ocean Engineering (CICC-ITOE2011)2   362 - 365   2011.3Binary ZCZ Codes With a Good Aperiodic Autocorrelation PropertyReviewed

  • Takahiro MATSUMOTO .  Compact Matched Filter for Integrand Code Using a Real-Valued Shift-Orthogonal Finite-Length Sequence .  IEICE Trans. FundamentalsJ94-A ( 3 ) 168 - 179   2011.3Compact Matched Filter for Integrand Code Using a Real-Valued Shift-Orthogonal Finite-Length SequenceReviewed

  • Takahiro Matsumoto, Shinya Matsufuji, Tetsuya Kojima, Udaya Parampalli .  A generation method of an orthogonal set of real-valued periodic orthogonal sequences from huffman sequences .  Proceedings of the 2011 Australian Communications Theory Workshop, AusCTW 2011   66 - 70   2011.1A generation method of an orthogonal set of real-valued periodic orthogonal sequences from huffman sequencesReviewed

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    This paper presents a generation method of an orthogonal set of real-valued periodic orthogonal sequences which has fast correlation algorithm. The periodic orthogonal sequence has the periodic autocorrelation function with zero sidelobes, and its orthogonal set is the set of the sequences whose periodic crosscorrelation function of the zero shift is zero. The real-valued periodic orthogonal sequence of period N = 2n with positive integer n is derived from a real-valued Huffman sequences of length M = 2ν + 1 with positive integer ν and ν ≥ n which has the aperiodic autocorrelation function with zero sidelobes except at left and right shift-ends. The set of real-valued periodic orthogonal sequences can be sufficiently applied to various systems, such as synchronous CDMA systems and digital watermarkings. ©2011 IEEE.

    DOI: 10.1109/AUSCTW.2011.5728739

    DOI: 10.1109/AUSCTW.2011.5728739

    Scopus

  • Tetsuya Kojima, Naoki Ohtani, Takahiro Matsumoto, Udaya Parampalli .  A blind digital watermarking scheme based on complete complementary codes .  Proceedings of the 2011 Australian Communications Theory Workshop, AusCTW 2011   1 - 6   2011.1A blind digital watermarking scheme based on complete complementary codesReviewed

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    Complete complementary code can be applied to digital watermarking technologies as well as communication systems like approximately synchronized CDMA because of its good correlation properties. In this paper, we propose a blind watermarking algorithm which does not need to refer any original data in the watermark extraction process. We also discuss the analogy between the proposed watermarking scheme and CT-CDMA communication systems based on complete complementary codes. In addition, some extensions of the proposed watermarking method and future problems are discussed in the paper. ©2011 IEEE.

    DOI: 10.1109/AUSCTW.2011.5728728

    DOI: 10.1109/AUSCTW.2011.5728728

    Scopus

  • Takahiro MATSUMOTO, Shinya MATSUFUJI .  Compact Matched Filter Banks of Optical ZCZ Codes Using Fast Algorithm for M-sequence Type Hadamard Matrix .  Journal of Signal Processing14 ( 6 ) 427 - 432   2010.11Compact Matched Filter Banks of Optical ZCZ Codes Using Fast Algorithm for M-sequence Type Hadamard MatrixReviewed

  • Shinya Matsufuji, Takahiro Matsumoto, Tomohiro Hayashida, Takafumi Hayashi, Noriyoshi Kuroyanagi, Pingzhi Fan .  On a ZCZ Code including a Sequence Used for a Synchronization Symbol .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE93A ( 11 ) 2286 - 2290   2010.11On a ZCZ Code including a Sequence Used for a Synchronization SymbolReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    This paper presents a ZCZ code which are combinedly used for spreading sequences and a synchronization symbol in quasi synchronous CDMA systems using PSK ASK or BFSK Furthermore a simple matched filter is presented which simultaneously calculates corre lawns with any sequences in the ZCZ code

    DOI: 10.1587/transfun.E93.A.2286

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  • Takahiro Matsumoto .  Compact Matched Filter for Integrand Code Using a Real-Valued Shift-Orthogonal Finite-Length Sequence .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE93A ( 11 ) 2328 - 2331   2010.11Compact Matched Filter for Integrand Code Using a Real-Valued Shift-Orthogonal Finite-Length SequenceReviewed

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    In this paper we proposed the compact construction of a matched filter for integrand code which do not require the high rate clock pulse in two valued PWM (pulse width modulation) code using a real valued shift orthogonal finite length sequence which has a sharp aperiodic autocorrelation function with zero sidelobes except at left and right shift ends This matched filters are implemented on a field programmable gate array (FPGA) corresponding to 400 000 logic gates A proposed matched filter for the sequence of length 129 can be constructed by the circuit scale of about 47% compared with conventional filter

    DOI: 10.1587/transfun.E93.A.2328

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  • Shinya MATSUFUJI, Takahiro MATSUMOTO .  Logic Functions of Complementary Arrays .  International Journal of Applied Mathematics and Informatics1 ( 4 ) 9 - 16   2010.9Logic Functions of Complementary ArraysReviewed

  • Takahiro MATSUMOTO, Shinya MATSUFUJI .  Optical ZCZ Code Generators Using Sylvester-type Hadamard Matrix .  International Journal of Communications1 ( 4 ) 22 - 29   2010.9Optical ZCZ Code Generators Using Sylvester-type Hadamard MatrixReviewed

  • Shinya Matsufuji, Takahiro Matsumoto .  On Logic Functions of Complementary Arrays of Length 2(n) .  Proc. of the 10th International Conference on Applied Informatics and Communications (AIC'10)   208 - +   2010.8On Logic Functions of Complementary Arrays of Length 2(n)Reviewed

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    Publisher:WORLD SCIENTIFIC AND ENGINEERING ACAD AND SOC  

    Complementary arrays means genaralization of a pair of sequences to multi-dimension, that at the same phase-shift the sum of these aperiodic auto-correlation functions takes zero except zero-shift. This paper considers logic functions of complementary arrays with length 2(n) including polyphase arrays whose elements consist of unit magnitude. The functions can show that these number is huge and relates to the phase number and length, but not dimension.

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  • Takahiro Matsumoto, Shinya Matsufuji .  Construction of Optical ZCZ Code Generators With the Smallest Zero Correlation Zone .  Proc. of the 10th International Conference on Applied Informatics and Communications (AIC'10)   216 - +   2010.8Construction of Optical ZCZ Code Generators With the Smallest Zero Correlation ZoneReviewed

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:WORLD SCIENTIFIC AND ENGINEERING ACAD AND SOC  

    In this paper, we propose the construction of two code generators for an optical ZCZ code of length N = 2(n), family size M = N/2-2 and zero correlation zone 1, which are called ROM-type and non ROM-type code generators. The optical ZCZ code is a set of pairs of binary and bi-phase sequences with zero correlation zone. An optical code division multiple access (CDMA) system using this code can remove co-channel interference and influence of multi-path. This ROM-type code generator can be constructed by a ROM and an up-counter. Similarly, this non ROM-type code generator can be constructed by an up-counter and logic gates. The ROM-type and non ROM-type code generators are implemented on a field programmable gate array (FPGA) corresponding to 400,000 logic gates, and the non ROM-type code generator can reduce logic elements than the ROM-type code generator.

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  • Takahiro MATSUMOTO, Shinya MATSUFUJI .  Compact Bank of Matched Filters for Optical ZCZ Codes Using Fast Algorithm for M-sequence Type Hadamard Matrix .  Proc. of the 2010 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'10)   628 - 631   2010.3Compact Bank of Matched Filters for Optical ZCZ Codes Using Fast Algorithm for M-sequence Type Hadamard MatrixReviewed

  • Takahiro Matsumoto, Shinya Matsufuji .  BER Performance of M-ary/ASK-SS System Using Compact Matched Filter Bank for Optical ZCZ Code .  Proc. of the 12th International Conference on Advanced Communication Technology (ICACT2010)   617 - 622   2010.2BER Performance of M-ary/ASK-SS System Using Compact Matched Filter Bank for Optical ZCZ CodeReviewed

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    Publisher:IEEE  

    The optical ZCZ code, which is a set of pairs of binary and bi-phase sequences with zero correlation zone, can provide code division multiple access (CDMA) communication system without co-channel interference. And M-ary amplitude shift keying spread spectrum (M-ary/ASK-SS) system using this code can detect a desired sequence without interference of undesired sequences. We proposed the compact construction of a bank of matched filters for this code, which is called tree-type bank of matched filters. However, M-ary/ASK-SS system using this filters might go down the bit error rate (BER) performance because input-output characteristics of this filters for zero correlation zone 4n-2 is nonlinear characteristics.
    In this paper, we clarify that BER performance in ASK-SS and M-ary/ASK-SS system under the additive white Gaussian noise (AWGN) and the frequency nonselective fading environments are not influenced by nonlinear characteristics of this filters by the computer simulation. The BER performance of ASK-SS system using tree-type bank of matched filters under the AWGN and frequency nonselective fading environments go down compared to BER performance of parallel-type filters as expected. But the BER performance of M-ary/ASK-SS system using this compact filters under the AWGN and frequency nonselective fading environment are almost equal compared to BER performance of parallel-type filters. In fact, the BER performance in M-ary/ASK-SS are not influenced by nonlinear characteristics of tree-type bank of matched filters.

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  • Takahiro Matsumoto, Yu Suwaki, Shinya Matsufuji .  Indoor Experiment of BER Performance of Optical CDMA System Using Optical ZCZ Code .  Proc. of the 12th International Conference on Advanced Communication Technology (ICACT2010)   890 - 893   2010.2Indoor Experiment of BER Performance of Optical CDMA System Using Optical ZCZ CodeReviewed

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    Publisher:IEEE  

    The optical ZCZ code, which is a set of pairs of binary and bi-phase sequences with zero correlation zone, can provide optical code division multiple access (COMA) communication system without co-channel interference. We proposed the compact construction of a code generator and a bank of matched filters for this code.
    In this paper, we verified that this system can suppress co-channel interference and interference by shifting of optical axis by data multiplex transmission experiment of optical COMA system using optical ZCZ codes which is called ZCZ-COMA system, consisting of a infrared light emitting diode(LEO), an avalanche photo diode(APO) module and field programmable gate array(FPGA) boards corresponding to 400,000 logic gates.
    As a result of data transmission experiment, optical ZCZCOMA system can suppress co-channel interference, but can't remove completely co-channel interference, and interference by shifting of optical axis is suppressed from about -30 to 30 degrees.

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  • Jincheng Huang, Shinya Matsufuji, Takahiro Matsumoto, Noriyoshi Kuroyanagi .  A Study on ZCZ-CDMA Systems in Short-Range Wireless Communications .  Proc. of the Ninth IEEE Malaysia International Conference on Communications (MICC 2009)   565 - 569   2009.12A Study on ZCZ-CDMA Systems in Short-Range Wireless CommunicationsReviewed

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    Publisher:IEEE  

    ZCZ-CDMA systems, which can remove co-channel interference by means of synchronization control and use of ZCZ codes, are useful for Short-Range Wireless communications. This paper investigates BER performance on ZCZ-CDMA systems using ASK, PSK, and BFSK modulations. This paper proposes a ZCZ-CDMA demodulation using signals which result from the combination of the preceding signal and the delayed signal. Because the preceding signal and delayed signal contain the same information, the path diversity gain is obtained by combining them. Computer simulations confirm that the BER performance is improved by combining the desired signals over Multipath fading channels.

    DOI: 10.1109/MICC.2009.5431434

    DOI: 10.1109/MICC.2009.5431434

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  • Takayuki Hirano, Shinya Matsufuji, Takahiro Matsumoto, Koichi Takimoto, Fusanori Miura .  On Lattice Wireless Network for Autonomous Distributed System .  Proc. of the Ninth IEEE Malaysia International Conference on Communications (MICC 2009)   725 - 729   2009.12On Lattice Wireless Network for Autonomous Distributed SystemReviewed

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    Publisher:IEEE  

    A lattice wireless network consisting of plural units, which possess sensor devices, communication devices, control devices, and processors, will be flexibly adapted for autonomous distributed sensor network systems.
    This paper clarifies the transmission characteristics of lattice wireless networks when a lot of communications happen at the same time between plural units and gives an approximation of data transmission time.

    DOI: 10.1109/MICC.2009.5431402

    DOI: 10.1109/MICC.2009.5431402

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  • Takahiro Matsumoto, Yu Suwaki, Shinya Matsufuji .  Experimental Evaluation of Parallel Transmission Using Optical ZCZ-CDMA System .  Proc. of the Fourth International Workshop on Signal Design and Its Applications in Communications (IWSDA'09)   118 - 121   2009.10Experimental Evaluation of Parallel Transmission Using Optical ZCZ-CDMA SystemReviewed

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    Publisher:IEEE  

    In the high speed parallel transmission of optical wireless communication, shifting of optical axis is important problem. An optical CDMA system using the optical ZCZ code is proposed as a method with the possibility that this problem can be solved without complicating hardware. The optical ZCZ code, which is a set of pairs of binary and bi-phase sequences with zero correlation zone, can provide optical code division multiple access (CDMA) communication system without co-channel interference. We proposed the compact construction of a code generator and a bank of matched filters for this code.
    In this paper, we verified that this system can remove co-channel interference even if an optical axis is shifted, by experiment of parallel transmission using an optical ZCZ-CDMA wireless communication system, consisting of a infrared light emitting diode(LED), an avalanche photo diode(APD) module and field programmable gate array(FPGA) boards corresponding to 400, 000 logic gates. Desired to undesired signal ratio (DU ratio) in correlation output whose shiftings of optical axis are 0 degrees and 45 degrees are improved about 61.9dB and 39.1dB, respectively. As a result of experiment on the optical parallel transmission, it was proved that this system was able to suppress interference by shifting of optical axis.

    DOI: 10.1109/IWSDA.2009.5346407

    DOI: 10.1109/IWSDA.2009.5346407

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  • Takayuki Hirano, Shinya Matsufuji, Takahiro Matsumoto, Koichi Takimoto, Fusanori Miura .  On Transmission Characteristics of Lattice Wireless Networks .  Proc. of the Fourth International Workshop on Signal Design and Its Applications in Communications (IWSDA'09)   177 - 180   2009.10On Transmission Characteristics of Lattice Wireless NetworksReviewed

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    Publisher:IEEE  

    A lattice wireless network consisting of plural units, which possess sensor devices, communication devices, control devices, and processors, will be flexibly adapted for autonomous distributed sensor network systems. This paper clarifies its transmission characteristics for lattice shape and the number of units transmitting data, simultaneously.

    DOI: 10.1109/IWSDA.2009.5346424

    DOI: 10.1109/IWSDA.2009.5346424

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  • Jincheng Huang, Shinya Matsufuji, Takahiro Matsumoto, Noriyoshi Kuroyanagi, Pingzhi Fan .  On BFSK-ZCZ-CDMA Systems .  Proc. of the Fourth International Workshop on Signal Design and Its Applications in Communications (IWSDA'09)   32 - +   2009.10On BFSK-ZCZ-CDMA SystemsReviewed

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    Publisher:IEEE  

    Quasi-synchronous CDMA systems, which can remove co-channel interference by means of synchronization control and use of a ZCZ code, are useful for Short-Range Wireless communications. This paper proposes a BFSK-ZCZ-CDMA modulation system which appears more advantageous in bit-error-rate performance over multi-path fading channels than ASK or PSK modulation scheme. In this system, a balanced ZCZ code and a quasi-coherent detection with IQ separation are used. The bit-error-rate performances over AWGN and fading channels are simulated.

    DOI: 10.1109/IWSDA.2009.5346430

    DOI: 10.1109/IWSDA.2009.5346430

    Web of Science

  • Shinya Matsufuji, Takahiro Matsumoto, Tomohiro Hayashida, Takafumi Hayshi, Noriyoshi Kuroyanagi, Pingzhi Fan .  On a ZCZ Code Including a Sequence Useful for Synchronization .  Proc. of the Fourth International Workshop on Signal Design and Its Applications in Communications(IWSDA'09)   28 - +   2009.10On a ZCZ Code Including a Sequence Useful for SynchronizationReviewed

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    Publisher:IEEE  

    This paper presents a ZCZ code which are combinedly used to spread data and synchronization symbol in quasi-synchronous CDMA systems using PSK, ASK or BFSK. Furthermore a simple matched filter is presented, which calculates simultaneously correlations with arbitrary sequences in the ZCZ code.

    DOI: 10.1109/IWSDA.2009.5346428

    DOI: 10.1109/IWSDA.2009.5346428

    Web of Science

  • Takahiro Matsumoto, Shinya Matsufuji .  Matched Filter Implementation on FPGA for Integrand Code Using a Real-Valued Shift-Orthogonal Finite-Length Sequence .  Proc. of the 11th International Conference on Advanced Communication Technology (ICACT2009)   179 - 183   2009.2Matched Filter Implementation on FPGA for Integrand Code Using a Real-Valued Shift-Orthogonal Finite-Length SequenceReviewed

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    Publisher:ELECTRONICS TELECOMMUNICATIONS RESEARCH INST  

    In this paper, we proposed the compact construction of a matched filter for integrand code, which do not require the high-rate clock pulse in two-valued PWM (pulse width modulation) code, using a real-valued shift-orthogonal finite-length sequence, which has a sharp aperiodic autocorrelation function with zero sidelobes except at left and right shift-ends. This matched filters is implemented on a field programmable gate array (FPGA) corresponding to 400, 000 gates. A proposed matched filter for the sequence of length 129 can be constructed by the circuit scale of about 47% compared with conventional filter.

    Web of Science

  • Yu SUWAKI, Takahiro MATSUMOTO, Shinya MATSUFUJI .  Experimental Evaluation of Optical ZCZ-CDMA System .  Proc. of the 23rd International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2008)   1809 - 1812   2008.7Experimental Evaluation of Optical ZCZ-CDMA SystemReviewed

  • Yukari TSUCHIYAMA, Shinya MATSUFUJI, Takahiro MATSUMOTO .  Generalization of Even-Shift Orthogonal Sequences to Multi-Dimension .  Proc. of the 23rd International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2008)   1425 - 1428   2008.7Generalization of Even-Shift Orthogonal Sequences to Multi-DimensionReviewed

  • Takahiro Matsumoto, Yoshihiro Tanada .  A Real-Valued Periodic Orthogonal Sequence Derived from A Real-Valued Shift-Orthogonal Finite-Length Sequence and Its Fast Periodic Correlation Algorithm .  Electronics and Communications in Japan,Part 390 ( 10 ) 18 - 28   2007.10A Real-Valued Periodic Orthogonal Sequence Derived from A Real-Valued Shift-Orthogonal Finite-Length Sequence and Its Fast Periodic Correlation AlgorithmReviewed

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    Publisher:SCRIPTA TECHNICA-JOHN WILEY & SONS  

    This paper proposes a real-valued orthogonal periodic sequence of a period N = 2(nu) derived from a real-valued shift-orthogonal finite-length sequence of length M = 2(nu) + 1. This paper also explains the principle of a fast correlation algorithm that efficiently executes periodic correlation processing for this real-valued orthogonal periodic sequence. The sidelobe of an aperiodic autocorrelation function for a real-valued shift-orthogonal finite-length sequence (length of M) is 0 except for the right and left ends of the shift. If the subsequent sequence of first values repeatedly overlap the final values of this sequence, a real-valued orthogonal periodic sequence of a period N = M - 1 can be obtained. A real-valued orthogonal periodic sequence of a period N = 2(nu) generated from real-valued shift-orthogonal finite-length sequence of length M = 2(nu) + I is obtained by convoluting partial sequences and based on that controls the number of multiplications and the number of additions to increment on the order of Nlog(2)N without using fast Fourier trans formation. (C) 2007 Wiley Periodicals, Inc.

    DOI: 10.1002/ecjc.20294

    DOI: 10.1002/ecjc.20294

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  • Takahiro Matsumoto, Shinya Matsufuji .  Code generator implementation on FPGA for an optical ZCZ code using a Sylvester type Hadamard matrix .  Proc. of 2007 International Workshop on Signal Design and Its Applications in Communications (IWSDA'07)   228 - 232   2007.9Code generator implementation on FPGA for an optical ZCZ code using a Sylvester type Hadamard matrixReviewed

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    Publisher:IEEE  

    The optical ZCZ code is a set of pairs of binary and bi-phase sequences with zero correlation zone. An optical code division multiple access (CDMA) system using this code can remove co-channel interference and influence of multi-path. We proposed the compact construction of a bank of matched filters for this code in a receiver. But we have not proposed the construction of a code generator for this code in a transmitter yet.
    In this paper, we propose the construction of two code generators for an optical ZCZ code using a Sylvester-type Hadamard matrix, which are called ROM-type and non ROM-type code generators. This ROM-type code generator can be constructed by a ROM and a up-counter. Similarly, this non ROM-type code generator can be constructed by a up-counter, flip-flops and logic gates. The ROM-type and non ROM-type code generators are implemented on a field programmable gate array (FPGA) corresponding to 400, 000 logic gates, and the non ROM-type code generator can reduce logic elements than the ROM-type code generator.

    DOI: 10.1109/IWSDA.2007.4408365

    DOI: 10.1109/IWSDA.2007.4408365

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  • Shinya Matsufuji, Takahiro Matsumoto, Kouki Funakoshi .  Properties of Even-Shift Orthogonal Sequences .  Proc. of 2007 International Workshop on Signal Design and Its Applications in Communications (IWSDA'07)   181 - +   2007.9Properties of Even-Shift Orthogonal SequencesReviewed

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    Publisher:IEEE  

    This paper investigates properties of the even-shift orthogonal sequence of length 2(n), whose out-of-phase aperiodic auto-correlation function takes zero at any even shift. It is shown that the halves of all E-sequences with odd n produced by logic functions are balanced sequences, whose elements 1 and -1 appear half, and there is not any balanced E-sequence for even n. Furthermore it is also shown that the aperiodic auto-correlation function possesses low values at odd shifts.

    DOI: 10.1109/IWSDA.2007.4408353

    DOI: 10.1109/IWSDA.2007.4408353

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  • Yoshihiro Tanada, Takahiro Matsumoto .  Fast Aperiodic Correlation Algorithm for Real-Valued Shift-Orthogonal Finite-Length Sequence of Length 2^ν+1 .  Electronics and Communications in Japan90 ( 9 ) 18 - 30   2007.9Fast Aperiodic Correlation Algorithm for Real-Valued Shift-Orthogonal Finite-Length Sequence of Length 2^ν+1Reviewed

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    Publisher:SCRIPTA TECHNICA-JOHN WILEY & SONS  

    Real-valued shift-orthogonal finite-length sequences are sequences in which the side lobes of the aperiodic autocorrelation function become 0, except for the end points of the shift to both sides, and can be applied in pulse compression radar and spread spectrum communications. In this paper, a fast correlation algorithm for efficiently calculating the periodic correlation function is discussed for real-valued shift-orthogonal finite-length sequences with length M = 2 nu + 1. For input data, including a real-valued shift-orthogonal finite-length sequence over a certain range, the value of the aperiodic correlation function is found in a certain shift range. Based on the synthesis of this sequence by the convolution of nu + I partial sequences, the correlation processing is broken down into correlation processing of the nu + I stages of partial sequences. As a result, the number of multiplications and the number of additions can be suppressed on the order M 1092 M. (C) 2007 Wiley Periodicals, Inc. Electron Comm Jpn Pt 3, 90(9): 18-30,2007; Published online in Wiley InterScience (www.interscience.wiley.com).

    DOI: 10.1002/ecjc.20301

    DOI: 10.1002/ecjc.20301

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  • Takahiro Matsumoto, Shigeo Tsukiashi, Shinya Matsufuji, Yoshihiro Tanada .  The bank of matched filters for an optical ZCZ code using a sylvester type hadamard matrix .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE89A ( 9 ) 2292 - 2298   2006.9The bank of matched filters for an optical ZCZ code using a sylvester type hadamard matrixReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    The optical ZCZ code is a set of pairs of binary and biphase sequences with zero correlation zone. An optical M-ary direct sequence spread spectrum (M-ary/DS-SS) system using this code can detect a desired sequence without interference of undesired sequences. However, the bank of matched filters in a receiver circuit may fall into large scale. In this paper, we propose the compact construction of a bank of matched filters for an M-ary/DS-SS system using an optical ZCZ code. This filter bank can decrease the number of 2-input adders from O(N-2) to O(N) and delay circuits from O(N-2) to O(N log(2) N), respectively, and is implemented on a field programmable gate array (FPGA) corresponding to 400, 000 logic gates.

    DOI: 10.1093/ietfec/e89-a.9.2292

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  • Shinya Matsufuji, Takahiro Matsumoto, Yoshihiro Tanada, Noriyoshi Kuroyanagi .  ZCZ codes for ASK-CDMA system .  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESE89A ( 9 ) 2268 - 2274   2006.9ZCZ codes for ASK-CDMA systemReviewed

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    Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    This paper presents two kinds of new ZCZ codes consisting of trios of two binary sequences and a bi-phase sequence, which can reach the upper bound on the ZCZ codes. From the viewpoint of sequence design, it is shown that they can provide the most effective ASK-CDMA system, which can remove co-channel interference.

    DOI: 10.1093/ietfec/e89-a.9.2268

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  • Yoshihiro TANADA, Takahiro MATSUMOTO .  Fast Aperiodic Correlation Algorithm for Real-Valued Shift-Orthogonal Finite-Length Sequence of Length 2^ν+1 .  IEICE Trans. FundamentalsVol.J89-A ( 6 ) 502 - 513   2006.6Fast Aperiodic Correlation Algorithm for Real-Valued Shift-Orthogonal Finite-Length Sequence of Length 2^ν+1Reviewed

  • Takahiro MATSUMOTO, Yoshihiro TANADA .  A Real-Valued Periodic Orthogonal Sequence Derived from a Real-Valued Shift-Orthogonal Finite-Length Sequence and Its Fast Periodic Correlation Algorithm .  IEICE Trans. FundamentalsJ89-A ( 5 ) 323 - 332   2006.5A Real-Valued Periodic Orthogonal Sequence Derived from a Real-Valued Shift-Orthogonal Finite-Length Sequence and Its Fast Periodic Correlation AlgorithmReviewed

  • Takahiro MATSUMOTO, Shigeo TSUKIASHI, Shinya MATSUFUJI, Yoshihiro TANADA .  A Design of a Digital Matched Filter Bank for an Optical ZCZ Code Using a Sylvester Type Hadamard Matrix .  Proc. of the Second International Workshop on Sequence Design and Its Applications in Communications (IWSDA'05)   184 - 188   2005.10A Design of a Digital Matched Filter Bank for an Optical ZCZ Code Using a Sylvester Type Hadamard MatrixReviewed

  • Shinya MATSUFUJI, Takahiro MATSUMOTO, Yoshihiro TANADA, Noriyoshi KUROYANAGI .  Extended ZCZ Codes for ASK-CDMA system .  Proc. of the Second International Workshop on Sequence Design and Its Applications in Communications (IWSDA'05)   90 - 93   2005.10Extended ZCZ Codes for ASK-CDMA systemReviewed

  • Takahiro MATSUMOTO, Yoshihiro TANADA .  Aperiodic autocorrelation functions of real-valued shift-orthogonal finite-length sequences with round-off errors .  Electronics and Communications in Japan,Part 387 ( 6 ) 1 - 12   2004.6Aperiodic autocorrelation functions of real-valued shift-orthogonal finite-length sequences with round-off errorsReviewed

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:SCRIPTA TECHNICA-JOHN WILEY & SONS  

    A real-valued shift-orthogonal finite-length sequence is a sequence for which the side-lobe of the aperiodic autocorrelation function is zero except at the two ends. It is effectively used in spread-spectrum communications and other applications. This type of sequence can be synthesized by using element sequences of adequate lengths. Consequently, fast correlation processing can be realized by dividing the process for each element sequence. A problem in this sequence is that the round-off error of its real values has an effect on the correlation characteristics. Therefore, this paper investigates the effect of the round-off error on integrated correlation processing and divided correlation processing. In the former, the mean-square error of the correlation output is inversely proportional to the sequence length. In the latter, it is the sum of the mean-square errors of the element sequences, which are inversely proportional to the respective sequence lengths. Thus, we see that the error of shorter element sequences should be reduced in the latter method in order to speed up correlation processing. This paper considers in particular a method by which the mean-square error is reduced without significantly enlarging the circuit scale. (C) 2004 Wiley Periodicals, Inc.

    DOI: 10.1002/ecjc.10152

    DOI: 10.1002/ecjc.10152

    Web of Science

  • Takahiro MATSUMOTO, Yoshihiro TANADA .  Aperiodic Autocorrelation Functions of Real-Valued Shift-Orthogonal Finite-Length Sequences with Round-Off Errors .  IEICE Trans. FundamentalsJ86-A ( 6 ) 674 - 683   2003.6Aperiodic Autocorrelation Functions of Real-Valued Shift-Orthogonal Finite-Length Sequences with Round-Off ErrorsReviewed

  • Takahiro MATSUMOTO, Yoshihiro TANADA .  Implementation of Multiple Digital Matched Filter for Quasi-Synchronous CDMA without Cochannel Interference Using Real-Valued Shift-Orthogonal Finite-Length Sequences .  Proc. of the 5th International Conference on Advanced Communication Technology (ICACT2003)   357 - 361   2003.1Implementation of Multiple Digital Matched Filter for Quasi-Synchronous CDMA without Cochannel Interference Using Real-Valued Shift-Orthogonal Finite-Length SequencesReviewed

  • Takahiro MATSUMOTO, Yoshihiro TANADA .  Fast Correlation Algorithms for a Real-Valued Shift-Orthogonal Finite-Length Sequence .  Proc. of 1st International Workshop on Sequence Design and Applications for CDMA Systems (IWSDA2001)   74 - 81   2001.9Fast Correlation Algorithms for a Real-Valued Shift-Orthogonal Finite-Length SequenceReviewed

  • Takahiro MATSUMOTO, Yoshihiro TANADA, Kiminori, SATO, Yoji NAGASAWA .  A Trial of a Fast Digital Matched Filter for a Real-Valued Shift-Orthogonal Finite-Length Sequence .  IEICE Trans. FundamentalsJ84-A ( 3 ) 374 - 386   2001.3A Trial of a Fast Digital Matched Filter for a Real-Valued Shift-Orthogonal Finite-Length SequenceReviewed

  • Takahiro MATSUMOTO, Yoshihiro TANADA, Takahiro WATANABE .  Digital matched filter of reduced operation elements for M-ary/DS-SS system using real-valued shift-orthogonal finite-length sequences .  Proc. of Third IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications (SPAWC2001)   46 - 49   2001.3Digital matched filter of reduced operation elements for M-ary/DS-SS system using real-valued shift-orthogonal finite-length sequencesReviewed

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    Publisher:IEEE COMPUTER SOC  

    A real-valued shift-orthogonal finite-length sequence has a sharp autocorrelation function with zero sidelobes except at shift ends, and can be synthesized by element sequences. In this paper, we propose the structure of a digital matched Alter for Mary Direct Sequence Spread Spectrum (M-ary/DS-SS) system using the sequences and the reduction of operation elements of the digital matched Alter. It is shown that this digital matched Alter for M-ary/DS-SS system can be constructed by the multipliers and the adders proportional to sequence length.

    DOI: 10.1109/SPAWC.2001.923839

    DOI: 10.1109/SPAWC.2001.923839

    Web of Science

  • Yoshihiro TANADA, Takahiro MATSUMOTO .  Real-Valued Convolutional PN Sequences and Their Application to Interference-Free Quasi-Synchronous CDMA .  Proc. of 4th World Multiconference on Systemics, Cybernetics and Informatics (SCI2000)VII   129 - 134   2000.7Real-Valued Convolutional PN Sequences and Their Application to Interference-Free Quasi-Synchronous CDMAReviewed

  • Takahiro MATSUMOTO, Yoshihiro TANADA, Kiminori SATOH, Youji NAGASAWA .  Digital Matched Filter Implementation on FPGA for a Shift-Orthogonal Finite-Length Sequence .  Proc. of the 10th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'99)   721 - 725   1999.9Digital Matched Filter Implementation on FPGA for a Shift-Orthogonal Finite-Length SequenceReviewed

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Books

  • 情報工学実験及び演習IIテキスト

    田中稔, 松元隆博(2章)

    山口大学工学部知能情報工学科  2008.4 

  • スペクトル拡散方式のためのシフト直交実数有限長系列の対する相関処理の高速化

    山口大学博士論文  2007 

  • ものづくり創成実習I,IIテキスト

    松元隆博, 内村俊二, 瀧本浩一, 平林晃(29,90)

    山口大学工学部知能情報システム工学科  2006  ( ISBN:9784902207026

  • 情報工学実験及び演習IIテキスト

    山口真悟, 松元隆博, 小林邦和, 佐伯徹郎, 内村俊二, 宮島啓一, 古賀和利, 伊藤暁(7,15)

    山口大学工学部知能情報システム工学科  2006 

  • 「LSI設計講習会」~論理設計とHDL設計~

    株式会社トッパンテクニカルデザインセンタ, 松元隆博(80,135)

    財団法人福岡県産業・科学技術振興財団システムLSI推進室  2004 

  • 情報工学実験および演習IIIテキスト

    松元隆博, 内村俊二, 瀧本浩一, 平林晃(36,82)

    山口大学工学部知能情報システム工学科  2002 

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Presentations

  • 井田悠太, 植田真帆, 松元隆博, 松藤信哉   MUDiv/OFDMA における直接判定法とターボ等化を用いた劣化CSI 割当の補償  

    2017年電子情報通信学会総合大会講演論文集  2017.3 

  • 西岡賢幸, 松元隆博, 松藤信哉   MP3圧縮に耐性を有する透かし入り音楽参照型電 子透かしの提案  

    第13回IEEE広島支部学生シンポジウム論文集  2011.11 

  • 河村慎吾, 松元隆博, 松藤信哉   M-ary/ASK-DS-SS方式の送受信機の試作  

    第9回IEEE広島支部学生シンポジウム論文集  2007.11 

  • 安達奨, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   LEDを用いた光無線通信の伝送特性の検証実験  

    第18回IEEE広島支部学生シンポジウム論文集  2016.11 

  • 佐渡葵, 安達奨, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   LEDとAPDを用いた光無線通信方式モデルの提案  

    平30電気・情報関連学会中国支部連合大会講演論文集  2018.10 

  • 坂口春香, 松元隆博, 松藤信哉   JPEG圧縮への耐性を持つ埋め込み画像参照型電子透かしの検討  

    第13回IEEE広島支部学生シンポジウム論文集  2011.11 

  • 大平康旦, 村永聡, 小柏香穂理, 松元隆博, 内藤博夫   IRのためのアンケートシステムの構築  

    平27電気・情報関連学会中国支部連合大会講演論文集  2015.10 

  • 杉本隆, 松元隆博, 鳥井秀幸, 松藤信哉   Huffman系列を用いたスペクトル拡散通信方式のBER特性の検討  

    第14回IEEE広島支部学生シンポジウム予稿集  2012.11 

  • 吉良隆志, 柴田智彦, 松元隆博, 村永聡, 渡邊孝博   FPGAによる16ビットμプロセッサ学生実験のハードウェア開発  

    第4回IEEE広島学生シンポジウム論文集  2002.12 

  • 林田知大, 松元隆博, 松藤信哉, 范平志   E系列より導かれるZCZ符号の性質について  

    電子情報通信学会技術研究報告,WBS2010-68  2011.3 

  • 舟越公毅, 松元隆博, 松藤信哉   E系列の性質について  

    電子情報通信学会技術研究報告,WBS2007-29  2007.8 

  • 西隈永一郎, 井田悠太, 松元隆博, 松藤信哉   DF協調通信におけるパケット分割と適応変調を用いた高速・高品質化の実現  

    2015年電子情報通信学会総合大会情報・システムソサイエティ特別企画学生ポスターセッション予稿集  2015.3 

  • 井田悠太, 西隈永一郎, 安昌俊, 松元隆博, 松藤信哉   DF-協調通信における同一フィードバック情報を用いたパケット分割と適応変調の実現  

    電子情報通信学会技術研究報告,CS2014-108  2015.2 

  • 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   CW妨害を受けるハフマン系列を用いたSS 方式のAWGN環境下でのBER特性の理論解析  

    平26年度電気・情報関係学会九州支部連合大会講演論文集  2014.9 

  • Shinya MATSUFUJI, Yuta IDA, Takahiro MATSUMOTO   Construction of Bent ZCZ Codes  

    2018.8 

  • 藤井宏之, 棚田嘉博, 松元隆博, 渡邊孝博   CDMA用符号の構成と多重伝送実験  

    2000年IEEE広島支部学生シンポジウム論文集  2000.1 

  • 黄金城, 松藤信哉, 松元隆博   BFSK‐ZCZ‐CDMA 方式の性能評価  

    第11回IEEE広島支部学生シンポジウム予稿集  2009.11 

  • 佐伯透真, 松藤信哉, 松元隆博, 井田悠太   Bent型ZCZ符号を適用したブロック符号化CDMAの性能評価  

    平27電気・情報関連学会中国支部連合大会講演論文集  2015.10 

  • 佐伯透真, 松藤信哉, 井田悠太, 松元隆博   Bent型ZCZ符号を適用したCDMAの性能評価  

    第18回IEEE広島支部学生シンポジウム論文集  2016.11 

  • 亀野晃弘, 松藤信哉, 林隆史, 黒田翔, 井田悠太, 松元隆博   Bent型ZCZ符号の構成について  

    電子情報通信学会技術研究報告,WBS2015-18  2015.7 

  • 亀野晃弘, 松藤信哉, 井田悠太, 松元隆博   Bent型ZCZ符号の性質について  

    第18回IEEE広島支部学生シンポジウム論文集  2016.11 

  • 松藤信哉, 林隆史, 黒田翔, 井田悠太, 松元隆博   Bent型ZCZ符号とCDMAへの適用について  

    電子情報通信学会技術研究報告,WBS2015-26  2015.7 

  • 林田知大, 松元隆博, 松藤信哉   Bent 関数に関連したZCZ符号の相関特性について  

    第13回IEEE広島支部学生シンポジウム論文集  2011.11 

  • 新明人, 松藤信哉, 松元隆博, 棚田嘉博, 畔柳功芳   Barker系列対を用いたASK-SS方式の提案  

    平17電気・情報関連学会中国支部連合大会講演論文集  2005.10 

  • エニワンアブドケレム, 松元隆博, 松藤信哉   ASK変調を用いたスペクトル拡散通信に適した拡散系列について  

    平成22年電気学会電子・情報・システム部門大会講演論文集  2010.9 

  • 新明人, 松元隆博, 松藤信哉   ASKを用いたSS方式に適した拡散系列の検討  

    電子情報通信学会技術研究報告,WBS2007-52  2007.12 

  • 久田竜也, 松藤信哉, 松元隆博, 棚田嘉博   ASK-ZCZ-CDMA方式の同期制御誤りに対する伝送効率の検討  

    第8回IEEE広島支部学生シンポジウム論文集  2006.11 

  • 本田彰平, 松藤信哉, 松元隆博, 棚田嘉博, 畔柳功芳   ASK-SS方式に適した拡散符号の検討  

    電子情報通信学会技術研究報告,WBS2005-13  2005.7 

  • 中村亮太, 大平康旦, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   AF中継方式を用いた光ZCZ-CDMA 方式に関する検討  

    第19回IEEE広島支部学生シンポジウム論文集  2017.12 

  • 井田悠太, 安昌俊, 松元隆博, 松藤信哉   AFリレー伝送C-HTRCI-MIMO/OFDMにおける干渉分散値を用いたチャネル推定強化法  

    電子情報通信学会技術研究報告,SRW2014-27  2014.10 

  • 井田悠太, 今福航太, 松元隆博, 松藤信哉   AFリレーTFI-OFDMシステムの性能評価  

    2015年電子情報通信学会ソサイエティ大会講演論文集(通信)  2015.9 

  • 井田悠太, 安昌俊, 松元隆博, 松藤信哉   AF リレーMIMO/OFDMにおける複素HTRCI パイロット信号を用いた性能強化  

    2014年電子情報通信学会総合大会講演論文集  2014.3 

  • Jincheng HUANG, Takahiro MATSUMOTO, Shinya MATSUFUJI, Noriyoshi KUROYANAGI   A Study on Frequency Correlation Characteristics over Rayleigh Fading Channel  

    2010.10 

  • Zeming DONG, Sho KURODA, Shinya MATSUFUJI, Yuta IDA, Takahiro MATSUMOTO   A Study on Block Coding ZCZ-CDMA Using the Hadamard Transform  

    2017.11 

  • 松藤信哉, 松元隆博   2次元相補系列を用いた 画像の電子透かし  

    科研費ワークショップ「相関特性の優れたスペクトル拡散系列に基づく安全性の高い情報ハイディングの開発」  2012.3 

  • 石藤潤一, 棚田嘉博, 松元隆博   2次元シフト直交実数有限長系列を用いた画像の電子透かし  

    平16電気・情報関連学会中国支部連合大会講演論文集  2004.10 

  • 廣澤知明, 野村浩輝, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   2次元ZCZ系列を用いた光CDMA方式の検討  

    平30電気・情報関連学会中国支部連合大会講演論文集  2018.10 

  • 小山貴弘, 棚田嘉博, 松元隆博   2次元DCTを用いた音楽データへの電子透かし  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 大川和人, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   2値PPMを用いた光ZCZ-CDMA方式の伝送実験  

    平30電気・情報関連学会中国支部連合大会講演論文集  2018.10 

  • 貞末克也, 松元隆博, 鳥井秀幸, 小嶋徹也, 松藤信哉   2 次元相補系列を用いた電子透かしの回転攻撃耐性  

    電子情報通信学会技術研究報告,EMM2012-40  2012.8 

  • 清水亮介, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   2 つの自己相関ピーク値を持つ2 次元光ZCZ 系列を用いたOCDMA方式に関する研究  

    第22回IEEE広島支部学生シンポジウム論文集  2020.11 

  • 柴田智彦, 吉良隆志, 松元隆博, 村永聡, 渡邊孝博   16ビットμプロセッサ学生実験のソフトウェア環境の開発  

    第4回IEEE広島学生シンポジウム論文集  2002.12 

  • 菱岡大樹, 吉良隆志, 柴田智彦, 村永聡, 松元隆博, 渡邊孝博   16ビットμプロセッサによる学部情報工学実験 ~(その2)プロセッサの開発  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 村永聡, 石村勝成, 三嶋一馬, 松元隆博, 渡邊孝博   16ビットμプロセッサによる学部情報工学実験 ~(その1)実験企画の概要  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 松元隆博, 平田智彦, 松藤信哉, 棚田嘉博, 末広直樹   M系列型アダマール系列による光ZCZ系列に対するM-ary方式用MFの構成法  

    平16電気・情報関連学会中国支部連合大会講演論文集  2004.10 

  • 塩崎圭亮, 井田悠太, 松元隆博, 松藤信哉   圧縮への高耐性を有する電子透かしの提案  

    第16回IEEE広島支部学生シンポジウム論文集  2014.11 

  • 塩崎圭亮, 井田悠太, 松元隆博, 松藤信哉   圧縮への高耐性を有する電子透かしの提案  

    第15回IEEE広島支部学生シンポジウム予稿集  2013.11 

  • 冨士谷豪, 黒田翔, 井田悠太, 松元隆博, 松藤信哉   ZCZ-CDMA方式のハードウェア実現について  

    第15回IEEE広島支部学生シンポジウム予稿集  2013.11 

  • 冨士谷豪, 黒田翔, 井田悠太, 松元隆博, 松藤信哉   ZCZ-CDMA 方式のハードウェア実現について  

    第16回IEEE広島支部学生シンポジウム論文集  2014.11 

  • Takahiro MATSUMOTO   Digital Matched Filter of Reduced Operation Elements for M-ary/DS-SS System Using Real-Valued Shift-Orthogonal Finite-Length Sequences  

    2001.3 

  • 菊田英夫, 前田桂子, 松元隆博, 棚田嘉博   高速相関可能な同期CDMA符号に対するマッチトフィルタの試作  

    第3回IEEE広島支部学生シンポジウム論文集  2001.12 

  • 菊田英夫, 松元隆博, 棚田嘉博   高速相関可能な同期CDMA符号に対するマッチトフィルタの演算素子数  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 岡野修身, 松元隆博, 棚田嘉博   高速相関可能なあるシフト直交実数有限長系列に関する検討  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 松元隆博, 棚田嘉博   高速相関アルゴリズムを有する偶数長のシフト直交実数有限長系列の乗算器数  

    平13年度電気関係学会九州支部連合大会講演論文集  2001.10 

  • 中村良生, 棚田嘉博, 松元隆博   高速相関に適した実数有限長系列の相互相関  

    第3回IEEE広島支部学生シンポジウム論文集  2001.12 

  • 渡邉肇, 松藤信哉, 松元隆博, 棚田嘉博   高速伝送可能な2つのマルチキャリアZCZーCDMA方式の検討  

    第6回IEEE広島支部学生シンポジウム論文集  2004.12 

  • 黒田翔, 小林一宏, 井田悠太, 松元隆博, 松藤信哉   高速伝送のためのブロック拡散ZCZ-CDMAについて  

    電子情報通信学会技術研究報告,WBS2014-81  2015.3 

  • エニワン アブドケレム, 黒田翔, 井田悠太, 松元隆博, 松藤信哉   高速伝送において干渉の無いマルチキャリア符号分割多元接続方式について  

    電子情報通信学会技術研究報告,RCS2014-160  2014.10 

  • 川崎裕志, 棚田嘉博, 松元隆博   音楽データの切断に耐える電子透かし  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 室川直哉, 井田悠太, 松元隆博, 松藤信哉   非対称SM-MIMOにおける推定分散値と閾値に基づく逐次等化の評価  

    電子情報通信学会技術研究報告,第4回コミュニケーションクオリティ(CQ)基礎講座ワークショップ  2017.10 

  • 林田知大, 松元隆博, 松藤信哉   非周期自己相関特性の鋭い系列を含むZCZ符号の設計  

    第32回情報理論とその応用シンポジウム論文集  2009.12 

  • 林田知大, 松元隆博, 松藤信哉, 范平志   非周期自己相関特性が良好なZCZ符号について  

    第33回情報理論とその応用シンポジウム論文集  2010.11 

  • 本田彰平, 松藤信哉, 松元隆博, 棚田嘉博   非同期ASK-CDMA方式に適した拡散符号の検討  

    第8回IEEE広島支部学生シンポジウム論文集  2006.11 

  • 大平康旦, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   零相関区間2zを有する光ZCZ系列の符号発生器の構成の検討  

    第18回IEEE広島支部学生シンポジウム論文集  2016.11 

  • 松藤信哉, 高興, 松元隆博, 末広直樹, 棚田嘉博   雑音への耐性を考慮したアナログ暗号化方式の提案  

    電子情報通信学会技術研究報告,WBS2005-22  2005.7 

  • 貞末克也, 松元隆博, 松藤信哉   鋭い非周期自己相関特性を持つ光ZCZ 符号の発生器の試作  

    第12回IEEE広島支部学生シンポジウム予稿集  2010.11 

  • Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI   Study of a Generation Method of a Two-Dimensional Optical ZCZ Sequence Set with Sharp Correlation Peak  

    The 42nd Symposium on Information Theory and its Applications (SITA2019)  2019.11 

  • 小山貴弘, 棚田嘉博, 松元隆博   量子化処理を利用した音楽への電子透かし  

    第5回IEEE広島支部学生シンポジウム論文集  2003.12 

  • 松尾昴英, 松元隆博, 松藤信哉   通信路推定を適用したZCZ-CDMA符号化方式の検討  

    第12回IEEE広島支部学生シンポジウム予稿集  2010.11 

  • 相本貴史, 棚田嘉博, 松元隆博   透かし画像の重ね合わせを用いた検出方法  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 西岡賢幸, 松元隆博, 松藤信哉   透かし入り音楽参照型電子透かしの検討  

    第14回IEEE広島支部学生シンポジウム予稿集  2012.11 

  • 高橋拓生, 松藤信哉, 松元隆博, 棚田嘉博   近似同期CDMA方式を用いた光無線通信  

    第5回IEEE広島支部学生シンポジウム論文集  2003.12 

  • 久田竜也, 松藤信哉, 松元隆博, 棚田嘉博, 畔柳功芳, 末広直樹   近似同期CDMA方式の誤り特性の検討  

    電子情報通信学会技術研究報告,WBS2006-83  2007.3 

  • 西村祐二, 井田悠太, 松元隆博, 松藤信哉   複素アダマール行列を用いたOFDMのPAPR低減について  

    第20回IEEE広島支部学生シンポジウム論文集  2018.11 

  • 大石周平, 瀧本浩一, 松元隆博, 三浦房紀, 関原弦   自律分散協調型避難誘導システムの開発 ~避難誘導ユニットへのアルゴリズムの実装~  

    第11回IEEE広島支部学生シンポジウム予稿集  2009.11 

  • 淵野智博, 松尾昴英, 松元隆博, 松藤信哉, 瀧本浩一, 三浦房紀   自律分散システムにおける格子型無線ネットワークの検討  

    2009年電子情報通信学会総合大会通信講演論文集  2009.3 

  • 青木博資, 松元隆博, 小嶋徹也, 鳥井秀幸, 井田悠太, 松藤信哉   背景差分法を用いた2 次元ZCZ系列による情報ハイディング手法の検討  

    平30電気・情報関連学会中国支部連合大会講演論文集  2018.10 

  • 國光良輔, 松元隆博, 松藤信哉, 畔柳功芳   経路分離機能をもつユーザMIMO多段中継伝送システムの提案  

    電子情報通信学会技術研究報告,RCS2011-243  2011.12 

  • 岡野修身, 松元隆博, 棚田嘉博   系列値の絶対値を抑えた実数有限長系列の検討  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 大平康旦, 村永聡, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   等利得合成を用いた光ZCZ-CDMA方式の伝送実験  

    平25電気・情報関連学会中国支部連合大会講演論文集  2013.10 

  • 室川直哉, 井田悠太, 松元隆博, 松藤信哉   空間変調を用いたMassive MIMOにおける推定分散値と閾値に基づく逐次等化  

    2017年電子情報通信学会総合大会講演論文集  2017.3 

  • 野村浩輝, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   移動時における光ZCZ-CDMA方式の伝送実験とその性能評価  

    第18回IEEE広島支部学生シンポジウム論文集  2016.11 

  • 野村浩輝, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   移動時における光ZCZ-CDMA方式のBER特性の検討  

    平27電気・情報関連学会中国支部連合大会講演論文集  2015.10 

  • 亀山博紀, 平野貴之, 松尾昴英, 松元隆博, 松藤信哉   短距離無線通信における性能評価  

    第11回IEEE広島支部学生シンポジウム予稿集  2009.11 

  • 田中敏輝, 井田悠太, 松元隆博, 松藤信哉   相関処理を利用した高信頼OFDMの検討  

    平30電気・情報関連学会中国支部連合大会講演論文集  2018.10 

  • 網永博之, 棚田嘉博, 松元隆博, 松藤信哉   相補系列を用いた原画像非参照型電子透かし  

    平15電気・情報関連学会中国支部連合大会講演論文集  2003.10 

  • 久田竜也, 松藤信哉, 松元隆博, 棚田嘉博, 畔柳功芳   直交系列対の一構成法  

    平17電気・情報関連学会中国支部連合大会講演論文集  2005.10 

  • 松藤信哉, 井田悠太, 松元隆博   直交性を活用した符号分割多元接続方式について  

    電子情報通信学会技術研究報告, 2016年度アシュアランスシステム研究会, AS2016  2017.3 

  • 藤井宏之, 棚田嘉博, 松元隆博, 渡邊孝博   直交する実数有限長系列の組の数値的検討  

    平11電気・情報関連学会中国支部連合大会講演論文集  1999.10 

  • 松元隆博, 前田桂子, 菊田英夫, 棚田嘉博   畳込み合成による実数有限長系列に対するマッチトフィルタの係数誤差  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 菊田英夫, 松元隆博, 棚田嘉博, 渡邊孝博   畳み込み法による合成系列のMFの構成  

    平12電気・情報関連学会中国支部連合大会講演論文集  2000.10 

  • 菊田英夫, 松元隆博, 棚田嘉博, 渡邊孝博   畳み込み法による合成系列に対するM-ary/DS-SS方式用マッチトフィルタの演算素子数の検討  

    2001年IEEE広島支部学生シンポジウム論文集  2001.1 

  • 犬飼悠, 棚田嘉博, 松元隆博   画像への符号分割による多重型電子透かし  

    平16電気・情報関連学会中国支部連合大会講演論文集  2004.10 

  • 犬飼悠, 松元隆博, 棚田嘉博   画像への実数値無相関系列を用いた多重型電子透かし  

    第6回IEEE広島支部学生シンポジウム論文集  2004.12 

  • 相本貴史, 棚田嘉博, 松元隆博, 松藤信哉   画像の電子透かしにおける埋め込み画像の画質の向上  

    第5回IEEE広島支部学生シンポジウム論文集  2003.12 

  • 石藤潤一, 棚田嘉博, 松元隆博   狭帯域化2次元シフト直交実数有限長系列を用いた画像の電子透かしの圧縮歪改善  

    平17電気・情報関連学会中国支部連合大会講演論文集  2005.10 

  • 三浦秀章, 松元隆博, 松藤信哉   狭帯域下での音声暗号化方式の検討  

    平19電気・情報関連学会中国支部連合大会講演論文集  2007.10 

  • 石村勝成, 渡邊孝博, 松元隆博, 棚田嘉博   状態遷移図入力による制御回路のCAD設計法  

    平12電気・情報関連学会中国支部連合大会講演論文集  2000.10 

  • 田邉政憲, 棚田嘉博, 松元隆博, 渡邊孝博   準同期CDMA方式用Gold系列と複合実数系列の系列数  

    平12電気・情報関連学会中国支部連合大会講演論文集  2000.10 

  • 中芝諒, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   汎用的な部品を用いた光ZCZ-CDMA 方式の伝送実験  

    第19回IEEE広島支部学生シンポジウム論文集  2017.12 

  • 荒瀬尚史, 井上実香, 松元隆博, 松藤信哉, 楠田正博   機械学習による個人認証システムの検討  

    第12回IEEE広島支部学生シンポジウム予稿集  2010.11 

  • 平野貴之, 松元隆博, 松藤信哉   格子型無線アドホックネットワークにおける高速な伝送アルゴリズムの検討  

    第33回情報理論とその応用シンポジウム論文集  2010.11 

  • 筒井崇朗, 棚田嘉博, 松元隆博, 松藤信哉   有限長PN系列を用いた多重ソナー  

    第5回IEEE広島支部学生シンポジウム論文集  2003.12 

  • 廣澤章, 高橋徹, 棚田嘉博, 松元隆博   有限長系列を用いた準同期CDMA方式  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 酒井研道, 松元隆博, 棚田嘉博   有限長系列による可変拡散率伝送で用いる符号発生器の比較  

    第4回IEEE広島学生シンポジウム論文集  2002.10 

  • 酒井研道, 林洋平, 松元隆博, 棚田嘉博   有限長系列による可変拡散率伝送で用いる符号発生器の検討  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 吉良隆志, 柴田智彦, 松元隆博, 村永聡, 渡邊孝博   教育用16ビットμプロセッサシステム~ハードウェア部の開発~  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 柴田智彦, 吉良隆志, 松元隆博, 村永聡, 渡邊孝博   教育用16ビットμプロセッサシステム~ソフトウェア部の開発~  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 國光良輔, 松元隆博, 松藤信哉, 畔柳功芳   擬似雑音系列を用いたMIMO多段伝送システムの誤り率特性に関する検討  

    第12回IEEE広島支部学生シンポジウム予稿集  2010.11 

  • 山口秀雄, 棚田嘉博, 松元隆博   擬似雑音化した透かしデータへのJPEG圧縮の影響  

    第4回IEEE広島学生シンポジウム論文集  2002.12 

  • 吉田純也, 松藤信哉, 松元隆博   搬送波周波数偏移下におけるZCZ-CDMA 方式の評価  

    第13回IEEE広島支部学生シンポジウム論文集  2011.11 

  • 吉田純也, 松元隆博, 松藤信哉, 畔柳功芳   搬送波周波数偏移におけるPSK-ZCZ-CDMAの検討  

    電子情報通信学会技術研究報告,RCS2011-233  2011.12 

  • 佐々木圭太, 江頭ちひろ, 松元隆博, 松藤信哉   搬送波周波数偏差下におけるASK-ZCZ-CDMA方式の誤り率特性の検討  

    第10回IEEE広島支部学生シンポジウム論文集  2008.11 

  • 小柏香穂理, 松元隆博, 王躍, 刈谷丈治, 内藤博夫   授業外学習時間とMoodleコース開設数の関係に関する一考察-大学評価とIRの視点から-  

    Moodle Moot Japan 2016  2016.2 

  • 蔵下征則, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   拡散反射通信路における光ZCZ系列セットを用いた同期光CDMA方式のBER特性の検討  

    2016年電子情報通信学会総合大会講演論文集  2016.3 

  • 蔵下征則, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   拡散反射通信路における光ZCZ-CDMA方式のBER特性の検討  

    第16回IEEE広島支部学生シンポジウム論文集  2014.11 

  • 蔵下征則, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   拡散反射型同期光ZCZ-CDMA方式の誤り率特性の理論的検討  

    平27電気・情報関連学会中国支部連合大会講演論文集  2015.10 

  • 蔵下征則, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   拡散反射型の光ZCZ-CDMA方式における符号間干渉の影響  

    電子情報通信学会技術研究報告,WBS2014-45  2014.12 

  • 高橋拓生, 松藤信哉, 松元隆博, 棚田嘉博   拡張したZCZ符号を用いた光CDMA方式の提案  

    電子情報通信学会技術研究報告,WBS2003-83  2003.12 

  • 小柏香穂理, 松元隆博, 王躍, 刈谷丈治, 内藤博夫   山口大学自己点検評価システムの評価とその改善  

    平27電気・情報関連学会中国支部連合大会講演論文集  2015.10 

  • 平林晃, 松元隆博, 石川昌明, 大坂英雄   山口大学工学部におけるディジタル信号処理教育事例-工学教育の理想像の実現を目指して-  

    平成15年度工学・工業教育研究講演会講演論文集  2003.9 

  • 平林晃, 渡邊孝博, 松元隆博, 浜本義彦, 石川昌明   山口大学工学部におけるディジタル信号処理教育 -学部3年次後期における学生実験の構想-  

    平成14年度工学・工業教育研究講演会講演論文集  2002.7 

  • 松元隆博, 村永聡, 渡邊孝博, 平林晃, 棚田嘉博, 石川昌明   山口大学工学部におけるLSI設計教育 -学部3年次後期における学生実験の構想-  

    平成14年度工学・工業教育研究講演会講演論文集  2002.7 

  • 棚田嘉博, 松元隆博   局間干渉のない準同期光空間CDMA  

    平11電子情報通信学会総合大会講演論文集  1999.3 

  • 棚田嘉博, 松元隆博   局間干渉のない準同期CDMAに対する系列の構成法  

    平10電気関係学会九州支部連合大会講演論文集  1998.10 

  • 棚田嘉博, 松元隆博   局間干渉および符号間干渉を抑圧した準同期CDMA  

    電子情報通信学会技術研究報告,SST98-81  1999.2 

  • 楠康正, 棚田嘉博, 松元隆博, 渡邊孝博   実数直交PN系列を用いた電子透かし  

    2000年IEEE広島支部学生シンポジウム論文集  2000.1 

  • 川崎裕志, 佐田丈治, 棚田嘉博, 松元隆博, 渡邊孝博   実数直交PN系列による音楽データへの電子透かし  

    2001年IEEE広島支部学生シンポジウム論文集  2001.1 

  • 楠康正, 棚田嘉博, 松元隆博, 渡邊孝博   実数直交PN系列による電子透かしの閾値判定  

    平12電気・情報関連学会中国支部連合大会講演論文集  2000.10 

  • 松尾忠宜, 楠康正, 棚田嘉博, 松元隆博, 渡邊孝博   実数直交PN系列による電子透かしにおける埋め込み位置の決定法  

    2001年IEEE広島支部学生シンポジウム論文集  2001.1 

  • 楠康正, 棚田嘉博, 松元隆博, 渡邊孝博   実数直交PN系列によるスクランブルを用いた電子透かし  

    平11電気・情報関連学会中国支部連合大会講演論文集  1999.10 

  • 山口秀雄, 棚田嘉博, 松元隆博   実数直交PN系列を用いた電子透かしの画像圧縮処理への耐性  

    第3回IEEE広島支部学生シンポジウム論文集  2001.12 

  • 藤井宏之, 棚田嘉博, 松元隆博   実数直交PN系列を用いた画像の多重スクランブル方式  

    平10電気・情報関連学会中国支部連合大会講演論文集  1998.10 

  • 山口秀雄, 川崎裕志, 棚田嘉博, 松元隆博   実数直交PN系列を用いた2値透かしデータの閾値判定  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 川崎裕志, 棚田嘉博, 松元隆博   実数直交PN系列による音楽データの電子透かし  

    電子情報通信学会技術研究報告,SST2001-55  2001.12 

  • 山口秀雄, 棚田嘉博, 松元隆博   実数直交PN系列による画像の電子透かし  

    電子情報通信学会技術研究報告,SST2001-56  2001.12 

  • 筒井崇朗, 棚田嘉博, 松元隆博   実数有限長系列を用いたバースト符号化ソナーの実験  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 松元隆博   実数有限長系列と2値系列とのマッチトフィルタの回路規模の比較  

    ミレニアムプロジェクト ミニワークショップ  2002.12 

  • 河村慎吾, 松元隆博, 棚田嘉博   実数値系列に対する被積分符号器の試作  

    第8回IEEE広島支部学生シンポジウム論文集  2006.11 

  • 廣澤章, 邵鵬, 棚田嘉博, 松元隆博   実数値系列に基づくパルス幅変調2値化符号の検討  

    平15電気・情報関連学会中国支部連合大会講演論文集  2003.10 

  • 棚田嘉博, 松元隆博   実数値有限長系列を用いた局間干渉と速度低下のない準同期CDMA  

    平12電子情報通信学会総合大会講演論文集  2000.3 

  • 松元隆博, 植松良介, 棚田嘉博   実数ZCZ有限長系列を用いたM-ary/DS-SS通信モデムの試作  

    電子情報通信学会技術研究報告,WBS2004-51  2004.12 

  • 安達充, 松元隆博, 棚田嘉博   実数ZCZ有限長系列によるM-ary/DS-SSのための符号発生器の試作  

    第6回IEEE広島支部学生シンポジウム論文集  2004.12 

  • 安達充, 松元隆博, 棚田嘉博   実数ZCZ有限長系列によるM-ary/DS-SSのための符号発生器の構成  

    平16電気・情報関連学会中国支部連合大会講演論文集  2004.10 

  • Shutaroh Takehara, Sho Kuroda, Shinya Matsufuji, Takahiro Matsumoto, Yuta Ida   On Derivation of Logic Functions of Polyphase Complementary Sequence Sets  

    The 21st IEEE Hiroshima Student Symposium  2019.11 

  • Syutaro TAKEHARA, Sho KURODA, Takahiro MATSUMOTO, Yuta IDA, Shinya MATSUFUJI   On Polyphase Cpmplementary Sequence Sets  

    IEICE Technical Report,WBS2019-2  2019.5 

  • 黒田翔, 松元隆博, 井田悠太, 松藤信哉   多相ZCZ符号のマッチドフィルターバンクの設計について  

    電子情報通信学会技術研究報告,RCS2018-254  2019.1 

  • 平田智彦, 松元隆博, 松藤信哉, 棚田嘉博   多次元直交変換器の構成  

    第7回IEEE広島支部学生シンポジウム論文集  2005.11 

  • 高興, 松藤信哉, 松元隆博, 末広直樹, 棚田嘉博   多次元直交変換を用いた高速アナログ暗号化方式の提案  

    第7回IEEE広島支部学生シンポジウム論文集  2005.11 

  • 東島大祐, 松藤信哉, 松元隆博, 棚田嘉博   多次元直交変換を用いた電子印鑑の検討  

    平16電気・情報関連学会中国支部連合大会講演論文集  2004.10 

  • 東島大祐, 松藤信哉, 松元隆博, 棚田嘉博   多次元直交変換の電子印鑑への適用  

    第6回IEEE広島支部学生シンポジウム論文集  2004.12 

  • 三浦秀章, 松藤信哉, 松元隆博, 棚田嘉博, 末広直樹   多次元直交変換における誤り補正について  

    平17電気・情報関連学会中国支部連合大会講演論文集  2005.10 

  • 土山由嘉莉, 松元隆博, 松藤信哉   多次元偶差直交系列の性質  

    電子情報通信学会技術研究報告,WBS2008-40  2008.10 

  • 土山由嘉莉, 松元隆博, 松藤信哉   多次元E系列の構成法  

    電子情報通信学会技術研究報告,WBS2007-38  2007.10 

  • 酒井陽光, 大川和人, 松元隆博, 井田悠太, 松藤信哉, 鳥井秀幸   多値PPMを用いた光ZCZ-CDMA 方式の伝送実験  

    第22回IEEE広島支部学生シンポジウム論文集  2020.11 

  • 村上哉太, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   変形擬直交M系列対の符号発生器の試作  

    平30電気・情報関連学会中国支部連合大会講演論文集  2018.10 

  • 大平康旦, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   変形擬直交M系列対のためのマッチドフィルタバンクの構成の検討  

    第19回IEEE広島支部学生シンポジウム論文集  2017.12 

  • 坂口春香, 根賀大介, 松元隆博, 松藤信哉   埋め込み画像参照型電子透かしの検討  

    平成22年電気学会電子・情報・システム部門大会講演論文集  2010.9 

  • 平野貴之, 松藤信哉, 松元隆博   埋め込み画像参照型電子透かしについて  

    電子情報通信学会技術研究報告,EMM2012-39  2012.8 

  • 山口秀雄, 棚田嘉博, 松元隆博   埋め込み画像の透かしの荷重とPSNRとの関係に関する検討  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 星出哲郎, 井田悠太, 松元隆博, 松藤信哉   圧縮への高い耐性を有する音楽の電子透かしに関する研究  

    第16回IEEE広島支部学生シンポジウム論文集  2014.11 

  • 松元隆博, 松藤信哉   回転攻撃を考慮した電子透かし手法について  

    科研費ワークショップ「相関特性の優れたスペクトル拡散系列に基づく安全性の高い情報ハイディングの開発」  2012.3 

  • 貞末克也, 松元隆博, 鳥井秀幸, 小嶋徹也, 松藤信哉   回転攻撃を考慮した電子透かしの高速化手法  

    第14回IEEE広島支部学生シンポジウム予稿集  2012.11 

  • 根賀大介, 坂口春香, 松元隆博, 松藤信哉   回転攻撃を考慮した2 次元相補系列を用いた電子透かしの検討  

    第12回IEEE広島支部学生シンポジウム予稿集  2010.11 

  • 林田知大, 松元隆博, 松藤信哉   同期制御信号を兼用可能な光ZCZ符号の検討  

    2009年電子情報通信学会総合大会基礎・境界講演論文集  2009.3 

  • 林田知大, 松元隆博, 松藤信哉   同期信号を兼用可能なZCZ符号とその相関器の設計  

    第11回IEEE広島支部学生シンポジウム予稿集  2009.11 

  • 貞末克也, 松元隆博, 松藤信哉   同期信号に使用できる光ZCZ符号の符号発生器の小規模構成法  

    第13回IEEE広島支部学生シンポジウム論文集  2011.11 

  • 大平康旦, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   同期ずれを考慮した光ZCZ-CDMA方式のBER特性に関する検討  

    2018年電子情報通信学会総合大会講演論文集  2018.3 

  • 高橋徹, 田邉政憲, 棚田嘉博, 松元隆博   合成直交実数有限長系列を用いたCDMAの基礎実験  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 井田悠太, 松元隆博, 松藤信哉   分割FFT拡散MIMO-OFDMにおけるアンテナインターリーブ割当  

    2018年電子情報通信学会ソサイエティ大会講演論文集  2018.9 

  • 松元隆博, 松藤信哉, 棚田嘉博   光ZCZ系列に対するM-ary方式用マッチトフィルタの一構成法  

    平16電気関係学会九州支部連合大会講演論文集  2004.9 

  • 松元隆博, 月足繁夫, 松藤信哉, 棚田嘉博   光ZCZ符号発生器の設計  

    電子情報通信学会技術研究報告,WBS2005-41  2005.10 

  • 松元隆博, 月足繁夫, 松藤信哉, 棚田嘉博   光ZCZ符号を用いたM-ary/DS-SS方式のためのマッチトフィルタの試作  

    電子情報通信学会技術研究報告,RCS2004-309  2005.1 

  • 松元隆博, 松藤信哉   光ZCZ符号を用いたM-ary/ASK-SS方式のBER特性の検討  

    第32回情報理論とその応用シンポジウム論文集  2009.12 

  • 高橋拓生, 松藤信哉, 松元隆博, 棚田嘉博   光ZCZ符号の相関特性  

    平16電気・情報関連学会中国支部連合大会講演論文集  2004.10 

  • Tomoya GYOBU, Takahiro MATSUMOTO, Yuta IDA, Shinya MATSUFUJI   On Construction of Optical ZCZ Codes  

    IEICE Technical Report,WBS2019-3  2019.5 

  • 高橋拓生, 松藤信哉, 松元隆博, 棚田嘉博   光ZCZ符号の一構成法  

    2004電子情報通信学会ソサイエティ大会(基礎・境界)  2004.7 

  • 高橋拓生, 松藤信哉, 松元隆博, 棚田嘉博   光ZCZ符号と光CDMAシステムへの適用に関する研究  

    電子情報通信学会技術研究報告,RCS2004-308  2005.1 

  • 林田知大, 松元隆博, 松藤信哉   光ZCZ-SS/CDMA方式の符号設計について  

    第10回IEEE広島支部学生シンポジウム論文集  2008.11 

  • 洲脇優, 松元隆博, 松藤信哉   光ZCZ-CDMA方式を用いた並列伝送の検討  

    第10回IEEE広島支部学生シンポジウム論文集  2008.11 

  • 洲脇優, 松元隆博, 松藤信哉   光ZCZ-CDMA方式の伝送実験  

    電子情報通信学会技術研究報告,CS2007-73  2008.3 

  • 中芝諒, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   光ZCZ-CDMA方式によるAF中継伝送実験  

    平30電気・情報関連学会中国支部連合大会講演論文集  2018.10 

  • 井上実香, 松元隆博, 松藤信哉   光ZCZ-CDMA方式とOOC-CDMA方式の性能比較  

    第13回IEEE広島支部学生シンポジウム論文集  2011.11 

  • 井上実香, 松元隆博, 松藤信哉   光ZCZ-CDMA 方式の誤り率特性に関する一検討  

    第12回IEEE広島支部学生シンポジウム予稿集  2010.11 

  • 洲脇優, 松元隆博, 松藤信哉   光ZCZ-CDMA 方式の並列伝送実験  

    第11回IEEE広島支部学生シンポジウム予稿集  2009.11 

  • 中村亮太, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   光ZCZ 系列セットを用いた光無線MIMO通信方式に関する検討  

    第18回IEEE広島支部学生シンポジウム論文集  2016.11 

  • 佐渡葵, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   光ZCZ 系列セットを用いた並列組合せSS 方式の伝送実験  

    第19回IEEE広島支部学生シンポジウム論文集  2017.12 

  • 舟越公毅, 松元隆博, 松藤信哉, 末広直樹   偶差直交系列の非周期相関特性  

    電子情報通信学会技術研究報告,CS2007-90  2008.3 

  • Tomoya Gyoubu, Takahiro Matsumoto, Yuuta Ida, Shinnya Matsufuji   On Construction of Optical ZCZ Codes With Low Correlation Propaties  

    The 21st IEEE Hiroshima Student Symposium  2019.11 

  • 大橋祐平, 黒田翔, 松元隆博, 井田悠太, 松藤信哉   低い相関特性を有する多相系列について  

    電子情報通信学会技術研究報告,CS2018-118  2019.3 

  • 形部智哉, 松藤信哉, 井田悠太, 松元隆博   位置情報に基づく省電力伝送方式の検討  

    第20回IEEE広島支部学生シンポジウム論文集  2018.11 

  • 井田悠太, 丸田一輝, 松元隆博, 松藤信哉   位相回転とASKを組み合わせたSD-SM-MIMOの検討  

    電子情報通信学会技術研究報告,CS2020-90  2021.3 

  • 網永博之, 棚田嘉博, 松元隆博, 松藤信哉   二次元相補系列を用いた相関利用型電子透かし  

    電子情報通信学会技術研究報告,WBS2003-79  2003.10 

  • Shutaroh Takehara, Sho Kuroda, Shinya Matsufuji, Takahiro Matsumoto, Yuta Ida   Generalized Complementary Sets of Polyphase Sequences  

    The 5th Workshop on Finite Field Theory and its Application for Pseudo-Random Sequences (FFTPRSWS2019)  2019.9 

  • 田邉政憲, 棚田嘉博, 松元隆博   一定のシフト範囲で局間干渉のない準同期CDMA用符号の数値的検討  

    第3回IEEE広島支部学生シンポジウム論文集  2001.12 

  • 大田晃弘, 松元隆博, 松藤信哉   レイリーフェージング環境下におけるブロック符号化ZCZ-CDMA方式の性能評価  

    電子情報通信学会技術研究報告,WBS2012-41  2012.11 

  • 藤井優希, 棚田嘉博, 松元隆博   マルチパス対応準同期CDMA方式の基礎実験  

    平17電気・情報関連学会中国支部連合大会講演論文集  2005.10 

  • 渡邉肇, 松藤信哉, 松元隆博, 棚田嘉博   マルチキャリアZCZーCDMA方式の検討  

    平16電気・情報関連学会中国支部連合大会講演論文集  2004.10 

  • 稲垣達也, 黒田翔, 井田悠太, 松元隆博, 松藤信哉   マッチドフィルタバンクを用いたZCZ-CDMA 通信モジュールの試作  

    第19回IEEE広島支部学生シンポジウム論文集  2017.12 

  • 村永聡, 渡邊孝博, 守川和夫, 松元隆博, 棚田嘉博   マイクロプロセッサのFPGA実装に関する一検討  

    平11電気・情報関連学会中国支部連合大会講演論文集  1999.10 

  • 柴田智彦, 吉良隆志, 渡邊孝博, 松元隆博, 棚田嘉博   プロセッサコアの再利用設計に関する研究-Rip-up IP方式の提案とその利用設計環境-  

    第5回IEEE広島支部学生シンポジウム論文集  2003.12 

  • 田村昌弘, 松藤信哉, 松元隆博   ブロック符号化方式を用いたASK-ZCZ-SS方式の検討  

    第10回IEEE広島支部学生シンポジウム論文集  2008.11 

  • 大田晃弘, 松元隆博, 松藤信哉   ブロック符号化ZCZ-CDMAの検討  

    第14回IEEE広島支部学生シンポジウム予稿集  2012.11 

  • 小林一宏, 黒田翔, 井田悠太, 松元隆博, 松藤信哉   ブロック拡散高速伝送方式の検討  

    第16回IEEE広島支部学生シンポジウム論文集  2014.11 

  • 大田晃弘, 松元隆博, 松藤信哉, 畔柳功芳   ブロック拡散ZCZ-CDMA方式の性能評価  

    第13回IEEE広島支部学生シンポジウム論文集  2011.11 

  • 林田知大, 松元隆博, 松藤信哉   パイロットシンボルに兼用できるZCZ符号の設計法について  

    平22電気・情報関連学会中国支部連合大会講演論文集  2010.10 

  • 林憲秀, 黒田翔, 井田悠太, 松元隆博, 松藤信哉   ソフトウェア無線によるZCZ-CDMA方式の実現についての検討  

    第16回IEEE広島支部学生シンポジウム論文集  2014.11 

  • 犬飼悠, 棚田嘉博, 松元隆博   スクランブルを用いたビット情報の埋め込み電子透かし  

    平15電気・情報関連学会中国支部連合大会講演論文集  2003.10 

  • 月足繁夫, 河村慎吾, 松元隆博, 松藤信哉, 棚田嘉博   シルベスタ形アダマール行列による光ZCZ符号発生器の試作  

    平17電気・情報関連学会中国支部連合大会講演論文集  2005.10 

  • 月足繁夫, 松元隆博, 松藤信哉, 棚田嘉博   シルベスタ型アダマール行列による光ZCZ系列に対するM-ary方式用マッチトフィルタの試作  

    平16電気・情報関連学会中国支部連合大会講演論文集  2004.10 

  • 酒井研道, 松元隆博, 棚田嘉博   シフト直交実数有限長系列を用いたSS通信変復調回路の試作  

    第5回IEEE広島支部学生シンポジウム論文集  2003.12 

  • 酒井研道, 松元隆博, 棚田嘉博   シフト直交実数有限長系列を用いたSS通信変復調回路の検討  

    平15電気・情報関連学会中国支部連合大会講演論文集  2003.10 

  • 松尾仁史, 筒井崇朗, 棚田嘉博, 松元隆博   シフト直交実数有限長系列を用いた車車間通信測距統合システムの基礎実験  

    平13年度電気・情報関連学会中国支部連合大会講演論文集  2001.10 

  • 山形裕紀, 松元隆博, 松藤信哉   シフト直交実数有限長系列を用いた被積分符号のためのマッチトフィルタの構成  

    電子情報通信学会技術研究報告,WBS2008-38  2008.10 

  • 山形裕紀, 松元隆博, 松藤信哉   シフト直交実数有限長系列を用いた被積分符号のためのマッチトフィルタの検討  

    第10回IEEE広島支部学生シンポジウム論文集  2008.11 

  • 松尾仁史, 棚田嘉博, 松元隆博, 渡邊孝博   シフト直交実数有限長系列を用いたSS通信測距統合システム  

    2001年IEEE広島支部学生シンポジウム論文集  2001.1 

  • 松元隆博, 前田桂子, 棚田嘉博   シフト直交実数有限長系列の要素系列の誤差と相関特性  

    電子情報通信学会技術研究報告,SST2001-54  2001.12 

  • 松元隆博, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列に対するマッチトフィルタの演算誤差の検討  

    電子情報通信学会技術研究報告,SST2000-63  2000.12 

  • 松元隆博, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列に対するマッチトフィルタの演算誤差  

    平11電気関係学会九州支部連合大会講演論文集  1999.10 

  • 松元隆博, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列に対するマッチトフィルタの係数誤差の検討  

    電子情報通信学会技術研究報告,SST98-136  1999.3 

  • 松元隆博, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列に対するマッチトフィルタの係数誤差  

    平11電子情報通信学会総合大会講演論文集  1999.3 

  • 松元隆博, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列に対するM-ary/DS-SS変調方式用MFの演算素子数の検討  

    第23回情報理論とその応用シンポジウム論文集  2000.10 

  • 松元隆博, 菊田英夫, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列に対するM-ary/DS-SS変調方式用MFの演算素子数  

    平12電気関係学会九州支部連合大会講演論文集  2000.9 

  • 松元隆博, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列による合成周期系列とその信号処理デバイス  

    平10電気関係学会九州支部連合大会講演論文集  1998.10 

  • 松元隆博, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列による可変拡散率伝送とその符号発生器の構成  

    平10電気・情報関連学会中国支部連合大会講演論文集  1998.10 

  • 松元隆博, 田邉政憲, 中村良生, 藤井宏之, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列による光空間多重伝送実験  

    平11電気・情報関連学会中国支部連合大会講演論文集  1999.10 

  • 松元隆博, 棚田嘉博   シフト直交実数有限長系列によるスクランブルの高速演算法  

    平15電気・情報関連学会中国支部連合大会講演論文集  2003.10 

  • 松元隆博, 棚田嘉博, 渡邊孝博   シフト直交実数有限長系列から導いた合成周期系列の高速相関アルゴリズムの演算数  

    平12電気・情報関連学会中国支部連合大会講演論文集  2000.10 

  • 松尾忠宜, 棚田嘉博, 松元隆博   カラー画像の電子透かしに関する基礎的検討  

    第3回IEEE広島支部学生シンポジウム論文集  2001.12 

  • 網永博之, 棚田嘉博, 松元隆博   カラー画像の電子透かしにおける切り取り処理耐性  

    第4回IEEE広島学生シンポジウム論文集  2002.12 

  • 網永博之, 棚田嘉博, 松元隆博   カラー画像の電子透かしにおけるJPEG圧縮耐性  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • 安達奨, 大平康旦, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   インターリーブによる光ZCZ符号のためのマッチドフィルタバンクの構成の検討  

    平27電気・情報関連学会中国支部連合大会講演論文集  2015.10 

  • 西川隆洋, 松元隆博, 鳥井秀幸, 松藤信哉   アダマール符号とZCZ符号から得られる直交符号に対するマッチドフィルタバンクの小規模化の検討  

    第14回IEEE広島支部学生シンポジウム予稿集  2012.11 

  • 松田悠希, 松藤信哉, 松元隆博, 井田悠太   アダマール変換を用いた伝送方式について  

    平27電気・情報関連学会中国支部連合大会講演論文集  2015.10 

  • 井上実香, 吉田祐太郎, 松元隆博, 松藤信哉, 楠田正博   アクティブRFID とWeb カメラを用いた個人認証システムの検討  

    第11回IEEE広島支部学生シンポジウム予稿集  2009.11 

  • 松元隆博, 棚田嘉博   ある型のシフト直交実数有限長系列に関する高速信号処理  

    第24回情報理論とその応用シンポジウム論文集  2001.12 

  • 松元隆博, 棚田嘉博, 松藤信哉   ZCZ系列に対するマッチトフィルタの構成法  

    平14電気・情報関連学会中国支部連合大会講演論文集  2002.10 

  • Yuhei OHASHI, Sho KURODA, Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI   On Correlation Properties of ZCZ Sequences and Zadoff-Chu Sequences  

    The 21st IEEE Hiroshima Student Symposium  2019.11 

  • 亀野晃弘, 井田悠太, 松元隆博, 松藤信哉   ZCZ符号間の相互相関特性について  

    第19回IEEE広島支部学生シンポジウム論文集  2017.12 

  • 小林一宏, 黒田翔, 井田悠太, 松元隆博, 松藤信哉   ZCZ符号を用いた高速伝送方式の検討  

    第15回IEEE広島支部学生シンポジウム予稿集  2013.11 

  • 佐々木勝士, 松元隆博, 松藤信哉   ZCZ-SS/CDMA方式の誤り特性の検討  

    電子情報通信学会技術研究報告,WBS2008-39  2008.10 

  • 佐々木勝士, 松元隆博, 松藤信哉   ZCZ-SS/CDMA方式の性能評価  

    第10回IEEE広島支部学生シンポジウム論文集  2008.11 

  • 上鉄穴明典, 黒田翔, 井田悠太, 松元隆博, 松藤信哉   ZCZ-CDMA方式の高速同期捕捉の一検討  

    平25電気・情報関連学会中国支部連合大会講演論文集  2013.10 

  • 吉田純也, 黄金城, 松藤信哉, 松元隆博   ZCZ-CDMA方式の搬送周波数偏移に対する他局間干渉の検討  

    平22電気・情報関連学会中国支部連合大会講演論文集  2010.10 

  • 佐々木勝士, 松元隆博, 松藤信哉, 畔柳功芳   ZCZ-CDMA方式の性能評価  

    電子情報通信学会技術研究報告,CS2007-74  2008.3 

  • 上鉄穴明典, 松元隆博, 松藤信哉   ZCZ-CDMA方式の同期確立について  

    電子情報通信学会技術研究報告,RCS2012-269  2013.2 

  • 松尾昂英, 松元隆博, 松藤信哉   ZCZ-CDMA方式における高速伝送の検討  

    第32回情報理論とその応用シンポジウム論文集  2009.12 

  • 田中大輔, 松元隆博, 平野貴之, 松藤信哉   ZCZ-CDMA方式におけるRTS衝突発生時のバックオフ時間の検討  

    平22電気・情報関連学会中国支部連合大会講演論文集  2010.10 

  • 田中大輔, 平野貴之, 松元隆博, 松藤信哉   ZCZ-CDMA方式におけるMACプロトコルの提案  

    電子情報通信学会技術研究報告,RRRC2011-12  2011.11 

  • 大田晃弘, 黄金城, 松元隆博, 松藤信哉   ZCZ-CDMA差動符号化方式の検討  

    平22電気・情報関連学会中国支部連合大会講演論文集  2010.10 

  • Shinya MATSUFUJI, Takahide MATSUO, Takahiro MATSUMOTO, Noriyoshi KUROYANAGI   Study on a Block Coding ZCZ-CDMA System for High-Speed Transmission  

    2011.7 

  • 井田悠太, 松元隆博, 松藤信哉   SP-OFDMにおける複素TFIと線形補間を用いたチャネル推定の実現  

    電子情報通信学会技術研究報告,CS2018-117  2019.3 

  • Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI, Kazuki MARUTA   Study on CR-QRM-MLD for SD-SM-MIMO Applying Null Modulation  

    IEICE Technical Report,,CS2019-115  2020.2 

  • 尾崎大, 松元隆博, 鳥井秀幸, 井田悠太, 松藤信哉   RAKE受信を用いた拡散反射型同期光ZCZ-CDMA 方式のBER特性評価  

    第22回IEEE広島支部学生シンポジウム論文集  2020.11 

  • 井田悠太, 夜船誠致, 安昌俊, 松元隆博, 松藤信哉   QRM-MLDとチャネルランキングを適用したHTRCI-MIMO/OFDMにおける非線形高速フェージング補償  

    電子情報通信学会技術研究報告,RCS2013-186  2013.11 

  • Ainiwan ABUDOUKEREMU, Shinya MATSUFUJI, Takahiro MATSUMOTO   On Optical ZCZ Codes and Their Aperiodic Autocorrelation Properties  

    2012.11 

  • Ainiwan ABUDOUKEREMU, Yuta IDA, Takahiro MATSUMOTO, Shinya MATSUFUJI   On Block Coding MC-ZCZ-CDMA System  

    第36回情報理論とその応用シンポジウム論文集  2013.11 

  • Zeming DONG, Sho KURODA, Shinya MATSUFUJI, Yuta IDA, Takahiro MATSUMOTO   On BC-ZCZ-CDMA Using an Hadamard Matrix  

    第19回IEEE広島支部学生シンポジウム論文集  2017.12 

  • 月足繁夫, 松元隆博, 松藤信哉, 棚田嘉博   M系列型アダマール行列による光ZCZ符号発生器のFPGAへの実装  

    第7回IEEE広島支部学生シンポジウム論文集  2005.11 

  • 月足繁夫, 松元隆博, 松藤信哉, 棚田嘉博   M系列型アダマール行列による光ZCZ符号に対するM-ary方式用MFの試作  

    第6回IEEE広島支部学生シンポジウム論文集  2004.12 

  • 松元隆博, 棚田嘉博, 佐藤公則, 長澤庸二   シフト直交実数有限長系列に対する符号発生器の試作  

    平8電気関係学会九州支部連合大会講演論文集  1996.10 

  • 棚田嘉博, 松元隆博, 佐藤公則, 長澤庸二   シフト直交実数有限長系列に対するディジタル相関器の構成  

    電子情報通信学会技術研究報告,SST96-21  1996.7 

  • Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA   Study on Construction of an Optical ZCZ Sequence Set Suitable for PPM-OCDMA System  

    Proc. of the 7th Workshop on Finite Field Theory and its Application for Pseudo-Random Sequences (FFTPRSWS2021)  2021.9 

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    Language:Japanese   Presentation type:Oral presentation (general)  

  • Hiroto Chosei, Ryosuke Shimizu, Yasuaki Ohira, Takahiro Matsumoto, Hideyuki Torii, Yuta Ida   Study on BER Performance of Optical ZCZ-CDMA System Using EWO and PPM  

    2021.11 

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    Language:Japanese   Presentation type:Poster presentation  

  • Ryu Yoshimura, Yuta Ida, Takahiro Matsumoto   Study on CR-QRM-MLD for SD-SM-MIMO under DF Relay Transmissions  

    2021.11 

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    Language:Japanese   Presentation type:Poster presentation  

  • 津森駿介, 井田悠太, 黒田翔, 松元隆博   深層学習を用いたガードインターバルを付加しないMUDiv-OFDMAの干渉除去  

    2022年電子情報通信学会ソサイエティ大会講演論文集  2022.9 

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    Language:Japanese   Presentation type:Oral presentation (general)  

  • Study on QO-STMB-MIMO applying Null Signal SM  

    2022.9 

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    Language:Japanese   Presentation type:Oral presentation (general)  

  • Adapting Zero Hybrid Guard Interval for MUDiv-DFTs-OFDMA  

    2022.9 

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Intellectual Property

  • 同期捕捉方法、同期捕捉回路及び無線通信システム

    松藤信哉, 松元隆博, 黒田翔

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    Applicant:国立大学法人山口大学,エフエクスシステムズ株式会社

    Application no:特願2014-558561  Date applied:2014.1

    Announcement no:特開2014-115693  Date announced:2014.7

    Patent/Registration no:特許6025157  Date registered:2016.10 

  • 分散ノード通信システム

    松藤信哉, 松元隆博, 畔柳功芳, 大竹孝平

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    Applicant:国立大学法人山口大学

    Application no:特願2010-039521  Date applied:2010.2

    Announcement no:特開2011-176650  Date announced:2011.9

    Patent/Registration no:特許5414055  Date registered:2013.11 

  • 近似同期CDMA通信方式

    松藤信哉, 松元隆博, 畔柳功芳

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    Applicant:国立大学法人山口大学

    Application no:特願2009-197665  Date applied:2009.8

    Announcement no:特開2011-049922  Date announced:2011.3

    Patent/Registration no:特許5300073  Date registered:2013.6 

  • アナログ符号化システム

    松藤信哉, 田中幹也, 棚田嘉博, 松元隆博

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    Applicant:国立大学法人山口大学

    Application no:特願2005-319320  Date applied:2005.11

    Announcement no:特開2007-129409  Date announced:2007.5

    Patent/Registration no:特許4719880  Date registered:2011.4 

  • 光近似同期CDMA方式とそれを用いた光無線システム

    松藤信哉, 棚田嘉博, 田中幹也, 松元隆博, 内堀晃彦

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    Applicant:国立大学法人山口大学

    Application no:特願2003-412590  Date applied:2003.12

    Announcement no:特開2005-175849  Date announced:2005.6

    Patent/Registration no:特許4304335  Date registered:2009.5 

  • 通信システム、通信局及び通信方法

    松藤信哉, 松元隆博, 井田悠太, 黒田翔

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    Applicant:国立大学法人山口大学,エフエクスシステムズ株式会社

    Application no:特願2015-080552  Date applied:2015.4

    Announcement no:特開2016-201676  Date announced:2016.12

  • 近似同期CDMA通信方式

    松藤信哉, 松元隆博, 畔柳功芳

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    Applicant:国立大学法人山口大学

    Application no:特願2009-270034  Date applied:2009.11

    Announcement no:特開2011-114657  Date announced:2011.6

  • 近似同期CDMA通信方式

    松藤信哉, 松元隆博, 畔柳功芳

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    Applicant:国立大学法人山口大学

    Application no:特願2009-269881  Date applied:2009.11

    Announcement no:特開2011-114636  Date announced:2011.6

  • 近似同期CDMA送受信装置

    松藤信哉, 松元隆博, 畔柳功芳, 末広直樹

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    Applicant:国立大学法人山口大学

    Application no:特願2009-502558  Date applied:2008.2

    Announcement no:特開2008-108294  Date announced:2008.9

  • 近似同期CDMA通信方式

    松藤信哉, 棚田嘉博, 田中幹也, 松元隆博, 若佐祐治

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    Applicant:国立大学法人山口大学

    Application no:特願2006-189632  Date applied:2006.7

    Announcement no:特開2007-49688  Date announced:2007.2

  • 異常検知通報装置

    田中幹也, 若佐祐治, 棚田嘉博, 松藤信哉, 松元隆博

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    Applicant:国立大学法人山口大学

    Application no:特願2005-146228  Date applied:2005.5

    Announcement no:特開2006-320517  Date announced:2006.11

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Works

  • 実数ZCZ有限長系列セットを用いたM-ary/DS-SS 通信モデムのベースバンド処理部の試作

    松元隆博, 植松良介, 棚田嘉博

    2005

  • 電灯線通信を用いた居住管理システムに関する研究

    2000

Awards

  • Certificate of Appreciation for Engineering Sciences Society

    2021.9   Institute of Electronics, Information & Communication Engineers, Japan (IEICE)  

    Takahiro MATSUMOTO

  • Service Award for Engineering Sciences Society

    2019.9   Institute of Electronics, Information & Communication Engineers, Japan (IEICE)  

    Takahiro MATSUMOTO

  • Outstanding Paper Award of the 15th International Conference on Advanced Communication Technology (ICACT2013)

    2013.1   ICACT2013  

    Takahiro MATSUMOTO

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    Award type:Award from international society, conference, symposium, etc.  Country:Korea, Republic of

  • Best Paper for the 10th International Conference on Applied Informatics and Communications (AIC '10)

    2010.8   AIC'10  

    Shinya Matsufuji, Takahiro Matsumoto

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    Award type:Award from international society, conference, symposium, etc.  Country:Japan

  • IEEJ Excellent Presentation Award

    2002.4   The Institute of Electrical Engineers of Japan  

    Takahiro MATSUMOTO

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

Research Projects

  • Research and Development of Resource Allocation by Estimation and Analysis of CSI with Associated Ultra-Flexibility and Optimality

    Grant number:JP225008001  2022.4 - 2023.3

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    Authorship:Coinvestigator(s) 

  • Evaluation and Implementation of Parallel Optical Wireless Communication System Resistant to Beam Spreading

    Grant number:21K04062  2021.4 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

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    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

  • 可視聴型情報ハイディングを応用したメディアアートに基づく新世代情報伝送技術の開発

    Grant number:18K11609  2018.4 - 2021.3

    日本学術振興会  科学研究費助成事業 基盤研究(C)  基盤研究(C)

    小嶋 徹也, 鵜木 祐史, 松元 隆博, 田中 晶, 姜 玄浩, 青木 直史, 松崎 頼人

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    前年度に引き続き,映像や音楽の一要素を秘密のメッセージで構成して情報伝送を実現するため,音楽や映像の構成要素となり得る情報の新しい埋め込み方式を検討した。令和元年度は,可視型の映像データハイディング技術を用いて情報伝送を行う方式について検討を行なった。一つは,映像の切り替わりでフェードイン・フェードアウト効果を用いてバーコードを用いて情報伝送する方式である。前年度は1次元バーコードのみを用いていたが,令和元年度はこれに加え,2次元バーコードであるQRコードを用いて同様の視覚効果を生成する方式について検討した。これに加え,動画データにおけるフレーム間の差分を利用してメッセージを埋めこむ方式についても検討した。これは,まったく同一のフレームが連続する場合を1,そうでない場合に0を表現するというもので,映像の変化によって2進に符号化されたメッセージを埋めこむものである。以上の方式については,メッセージが正しく伝送されるかを検証するのみならず,映像として自然に認識できるかどうかを主観評価を用いて検証した。また,メッセージの抽出精度に関しては,計算機上のシミュレーションだけではなく,ディスプレイにメッセージが埋め込まれた動画を表示し,これをカメラで撮影した映像からでも正しくメッセージの抽出が行なえることを確認した。 作成されたステゴ映像は学内でウェブ上で公開し,主観評価を行なったが,学外に公開して不特定多数を対象とした調査はできなかった。これについては次年度以降の課題とする。また,スマートフォンやタブレット用の受信アプリの開発も次年度の課題である。研究成果は学会等で発表を行なった。

  • Realization of optical underwater wireless communication capable of long distance and multiple transmission

    Grant number:18K04145  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

  • The 8th International Workshop on Signal Design and its Applications in Communications (IWSDA'17)

    2017.6 - 2017.12

    村田学術振興財団  研究会(学会)助成 

  • 水中光無線通信方式の多段中継による大容量化に関する研究

    2016.4 - 2019.3

    公益財団電気通信普及財団  電気通信普及財団研究調査助成 

    松元隆博

  • Study on highly efficient and reliable CDMA systems using Bent ZCZ codes

    Grant number:15K06068  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    MATSUFUJI Shinya

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    Grant amount:\4940000 ( Direct Cost: \3800000 、 Indirect Cost:\1140000 )

    We have searched for reliable and high efficiency of code division multiple access system without interference (ZCZ - CDMA), which multiple mobile terminals can dynamically construct wireless network flexibly. This includes the design of new bent ZCZ codes whose correlation functions are totally low except the zero correlation zone, the design of a compact matched filter bank (MFB) that can output the correlation between the received signal and all sequences of the ZCZ code, the proposal of a high-speed synchronous acquisition circuit using MFB, and the construction of a block coding method for high-speed transmission applying complex Hadamard transform.

  • An Effective Active Learning Systems for MOOCs Based on Information Hiding Techniques for Video Data

    Grant number:15K01109  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    Kojima Tetsuya, PARAMPALLI Udaya, TACHIKAWA Toru, ICHIOKA Yui, SADA Yuki, KAMADA Kan, MATSUNAGA Yuto

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    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

    In this study, an online active learning system based on digital video watermarking techniques has been developed. In the developed system, teachers can grasp how much the students' self studies progress by utilizing the markers embedded into the video learning materials. When a student logs in the web-based system and watches the video materials, the embedded markers can be extracted automatically and sent to the servers on the teachers's side. It is quite difficult to recognize the embedded markers on the stego video materials. The markers can be extracted quite faster than the previously proposed watermarking schemes since image feature quantities such as AKAZE are employed to embed the watermarks. In addition, the embedded watermarks can be extracted successfully by utilizing these image feature quantities.

  • Development and application of a visualization tool for organizational assessment of educational activities

    Grant number:15K01071  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    Ogashiwa Kahori, KARIYA Joji, HIROKAWA Sachio, MORI Masao

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    Grant amount:\3510000 ( Direct Cost: \2700000 、 Indirect Cost:\810000 )

    This study proposes an organizational assessment method of university educational activities. We aggregated the necessary data from the university educational activity databases based upon the Yamaguchi University self-assessment and evaluation system. Furthermore, we developed and improved tools to visualize the results and proposed a visualization system that uses text mining technology for university educational activity documents. By applying our unique viewpoint to case-study analysis, we were able to extract the characteristics of university educational activities. The results demonstrate a new organizational assessment method for universities.

  • Implementation of High Speed and Reliability Optical Wireless Communication System Considering Movement

    Grant number:24760301  2012.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    MATSUMOTO TAKAHIRO

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    Grant amount:\4290000 ( Direct Cost: \3300000 、 Indirect Cost:\990000 )

    In this research, I have proposed and manufactured the high speed and reliability optical wireless communication system considering receiver’s movement which is constructed by many infrared light emitting diodes (LEDs), avalanche photo diodes (APDs) and a field programmable gate array (FPGA) board corresponding to 132,540 logic elements (LEs) by way of trial, and it is obtained by combining of received signal and orthogonality of pseudo noise sequence. The bit-error rate (BER) performance of the proposed system is evaluated by the indoor experiment and computer simulation.
    As a result, the system can reduce deterioration of BER performance even if the receiver moves, and the optimal distance between adjoined APD and APD exists.

  • A Disaster Prevention Broadcasting System Based on An Effective Audio Watermarking Scheme Using Spread Spectrum Techniques

    Grant number:24510240  2012.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    KOJIMA Tetsuya, YOSHIMOTO Sadanobu, MATSUMOTO Takahiro, TANAKA Akira, DOI Nobukazu

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    Grant amount:\5590000 ( Direct Cost: \4300000 、 Indirect Cost:\1290000 )

    In this study, we proposed a novel disaster prevention broadcasting scheme based on audio data hiding using complete complementary codes. In the proposed system, the disaster information is embedded into siren sound. In the research period, the specific embedding and extracting algorithm has been proposed. The methods to set various parameters and to apply error correcting codes has also been proposed. In addition, a receiver application run on tablets and smartphones has been developed. After the stego siren sound conveying such information is broadcasted from a loud speaker, the embedded information can be extracted and displayed at the receiver such as tablets and smartphones. The effectiveness of the proposed system has been evaluated through analog transmission experiments using a loud speaker in the indoor scenario as well as numerical simulations. As a result, an effective information transmission can be realized with low bit error rates by setting appropriate parameters.

  • Basic study on suppression of harmful optical stimulation due to the group of large-size displays as advertisement medium in the urban area

    Grant number:23651167  2011 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research  Grant-in-Aid for Challenging Exploratory Research

    TADAMURA Katsumi, MATSUMOTO Takahiro

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    Grant amount:\4030000 ( Direct Cost: \3100000 、 Indirect Cost:\930000 )

    In this research, we carried out a basic study for a method for preventing from the occurrence of the harmful optical stimulus of which the large-sized high-output digital signage group has a possibility to cause. We firstly produce experimentally the optical wireless communication system which efficiently communicates between displays, and evaluate the bit error rate (BER) performance of this system by the transmission experiment. As a result of data transmission experiment, we clarified that this system can improve the BER performance compared with a conventional system. Then, we considered about indispensable information for avoiding the occurrence of health impairment which is caused by the harmful optical stimulus. Moreover, we designed a management method including the equipment configuration which fits current circumstance of information and communication and a method for evaluating risk of the occurrence of the health impairment.

  • オーストラリアメルボルン大学での在外研究

    2010.9 - 2011.3

    山口大学工学部  プロジェクト等経費(新長州五傑) 

    松元隆博

  • Evaluation and Implementation of Parallel Optical Wireless Communication System for Shifting of Optical Axis

    Grant number:21760294  2009 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    MATSUMOTO Takahiro

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    In this research, I verified that this system can suppress co-channel interference and interference by shifting of optical axis by data multiplex transmission experiment of optical code division multiple access(OCDMA) system using optical zero-correlation zone(ZCZ) codes which is called optical ZCZ-CDMA system, consisting of a infrared light emitting diode(LED), an avalanche photo diode(APD) module and field programmable gate array(FPGA) boards corresponding to 400,000 logic gates. As a result of data transmission experiment, optical ZCZ-CDMA system can suppress co-channel interference, but can' t remove completely co-channel interference, and interference by shifting of optical axis is suppressed from about-30 to 30 degrees.

  • Secure Information Hiding Technologies Based on Spread Spectrum Sequences with Good Correlation Properties

    Grant number:21560423  2009 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    YOSHIMOTO Sadanobu, KOJIMA Tetsuya, MATSUFUJI Shinya, KAWAMURA Yutaka, IISAKU Shunichi, DOI Nobukazu, TANAKA Akira, MATSUMOTO Takahiro

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    Grant amount:\3900000 ( Direct Cost: \3000000 、 Indirect Cost:\900000 )

    We developed information hiding technologies using complete complementary codes, one of the spread spectrum sequences with ideal correlation properties. Specifically, a digital watermarking scheme, a digital fingerprinting scheme, and a steganography scheme using image data are proposed. The properties of these schemes are evaluated through numerical experiments on the transparency of the secret information, correctness of the extraction and the robustness against various attacks. As a result, it is shown that the proposed schemes have superior to the method based on other spread sequences.

  • 被写体情報編集システムの開発に関する研究

    2008.4 - 2011.3

    共同研究 

    松元隆博

  • On ZCZ-CDMA Systems With High Performance

    Grant number:20560358  2008 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    MATSUFUJI Shinya, MATSUMOTO Takahiro, KUROYANAGI Noriyoshi, NAITO Toshikatsu

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    Grant amount:\3900000 ( Direct Cost: \3000000 、 Indirect Cost:\900000 )

    Advanced mobile wireless network systems, that instantaneously connect with mobile robots or motor cars, will invent a big market in the future. However there is no communication device with good properties such that two or more user can connect instantaneously and communicate in real time and simultaneously.
    In this study, Code Division Multiple Access systems with the good properties called ZCZ-CDMA systems are discussed and investigated in detail. Furthermore sending and receiving circuits with facilitation of hardware construction are proposed under a newly designed communication protocol.

  • 自律分散協調型避難誘導システムの開発

    2007.4 - 2010.3

    総務省消防庁  消防防災科学技術研究推進制度 

    三浦房紀, 瀧本浩一, 松藤信哉, 松元隆博, 藤本充, 榎原秀樹, 松野太, 須加昌昭, 岸下崇裕, 門田俊一, 山田茂, 城尾好文 鈴木修 組田良則 小幡克実

  • スペクトル拡散信号処理システムのFPGAによる試作に関する研究

    2007.4 - 2009.3

    共同研究 

    松元隆博

  • 他局による干渉を抑制する光CDMA方式の性能評価

    2007.4 - 2008.3

    国立研究開発法人科学技術振興機構(JST)  シーズ発掘試験 

    松元隆博

  • User-Identification Position-Sensing Asynchronous CDMA Communication System Using Finite-Length PN-Sequences

    Grant number:18560378  2006 - 2007

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    TANADA Yoshihiro, MATSUFUJI Shinya, MATSUMOTO Takahiro

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    Grant amount:\3690000 ( Direct Cost: \3300000 、 Indirect Cost:\390000 )

    In the ad hoc network or sensor network, a technique to identify a signal sender and simultaneously to sense the position of the sender is desired. This project aimed to develop an asynchronous CDMA communication and position-sensing system using finite-length PN sequences. The achievements of the research are as the followings.
    (1) Research on real-valued finite-length sequences For this system, a sequence set to bring high transmission efficiency has been developed. For user's selective formation of wireless network, other sequence pairs with impulsive correlation are investigated, to bring a little lower transmission efficiency.
    (2) Development of multiplexing communication system The communication system for 4 users allotted by real-valued sequences of length 65 has been developed to transmit two-valued modulated signal from multi-rate data and to demodulate the data with interference, noise and amplitude distortion suppressed through correlation processing. This system has high efficiency of frequency usage and the stronger tolerance with amplitude distortion than the OFDM system (as adopted to terrestrial TV system).
    (3) The position sensing system has been developed to calculate the position by intersecting the hyperbolas derived from distance differences between a transmitting antenna and three Deceiving antennas placed on the apex of a triangle. The accuracy of detected position depends on the distances between the antennas and on the time interval of system clock.
    The developed system for detecting the person or object possessing a code and communicating with each is a proposal. The future subject is the research and development of improvements for practical use.

  • 医療福祉用通信システムの研究

    2004.4 - 2005.3

    受託研究 

    棚田嘉博 松元隆博

  • 無線LAN国際標準IEEE802.11bおよび11gに準拠した高性能受信チップの研究開発

    2003.4 - 2006.3

    国立研究開発法人科学技術振興機構(JST)  大学発ベンチャー創出事業 

    末広直樹, 棚田嘉博, 松藤信哉, 伊本俊明, 内藤敏勝 松元隆博

  • 局間干渉、符号間干渉を抑圧するCDMA符号による並列高速伝送システムの小規模化

    Grant number:15760266  2003 - 2004

    日本学術振興会  科学研究費助成事業 若手研究(B)  若手研究(B)

    松元 隆博

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    Grant amount:\3200000 ( Direct Cost: \3200000 )

    本研究では,実数ZCZ有限長系列を用いたM-ary/DS-SS通信モデムのベースバンド処理部の小規模な構成法を提案し、実際にそれをLSIで試作を行った。
    実数ZCZ有限長系列セットは,その非周期自己相関関数が端点を除き直交し,相互相関関数がある区間において0となる系列セットである。そのため,この系列を用いたM-ary/DS-SS通信では,系列同士を干渉なく識別することが出来る。しかしながら、実数値をとる系列であるために回路規模が大規模になることが問題となっていた。
    受信側で用いるマッチフィルタについては,系列を隼成するときに用いた実数直交有限長系列に対するマッチトフィルタを縦続接続させて構成し,さらに共通部分を共有化することによって回路規模を減少させる構成法を提案した。また、送信側で用いる符号発生器については,上記構成のマッチトフィルタを用いることによって小規模な回路で実現できるツリー型符号発生器を提案した。これは、マッチトフィルタのインパルス応答が系列の時間反転波形になることを利用している。これによると,系列セット内の各系列に対する複数のマッチトフィルタに入力するインパルス信号の入力端子と入力タイミングを制御するだけで簡単に,所望の系列を発生させることができる。
    これらの構成法を適用した、系列長129,系列数8,無相関区間3の実数ZCZ有限長系列を用いたM-ary/DS-SS通信モデムのベースバンド処理部を,東京大学大規模集積システム設計教育研究センタ(VDEC)を介して,実際にLSIの試作を行った。設計は,ハードウェア記述言語の一つであるverilog HDLを用い,シミュレーションはメンターグラフィックス社のmodel sim,またはケーデンス社のverilogXLを,論理合成は,シノプシス社のDesign Compilerを,配置配線には,シノプシス社のApolloを,デザインルールチェック(DRC)とレイアウト対スケマティック(LVS)には,メンターグラフィックス社のCalibreをそれぞれ用いた。試作したLSIは、電源電圧が3.3V、チップ寸法が4.9mm角のCMOS 0.35μmプロセスのLSI(ローム社)である。その結果、送信側、受信側合わせて、系列長129のマッチトフィルタを16個含んでいるのにもかかわらず、2入力のNANDゲート換算で約7.7万ゲートの規模で実装できた。また、80MHzのクロックで動作することが確認できた。これはチップレートが80Mcpsであることを意味する。動作確認の結果、理論通り、同期点の前後1チップの区間において、他の系列による干渉を抑圧出来ていることが確認できた。

  • 局間干渉,符号間干渉を抑圧するCDMA符号による並列伝送システムの小規模化

    2002.10 - 2003.3

    山口大学工学部  プロジェクト21M-A 

    松元隆博

  • Research on Digitalized Spread Spectrum Communication System Using Real-Valued Sequences

    Grant number:10650365  1998 - 1999

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    TADANO Yoshihiro, MATSUMOTO Takahiro, WATANABE Takahiro

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    Grant amount:\2500000 ( Direct Cost: \2500000 )

    This project has been performed from 1998 to 1999, for the purpose of developing real-valued sequences for a quasi-synchronous CDMA system with no interchannel interference and with little intersymbol interference and implementing trial degitalized modems for this CDMA system, to bring a novel technique to the current CDMA systems. The aim of this research is nearly attained. Digital fast processors of code generation and correlation are implemented on FPGA, because of construction of the real-valued sequences applicable to fast signal processing algorithm. Performances of correlation processing in the multiple access experiment almost follow those of designed values. The real-valued finite-length sequences developed in this research are effective to design the codes of high efficiency data transmission free from the guard interval to avoid interferences, and so expected to be developed to the future concrete application system.
    The achievements of this project are the followings.
    (1) Developments of the sequences for CDMA and the algorithm of fast correlation
    Orthogonal sets of real-valued finite-length sequences with sharp autocorrelation function are derived from the convolution of element sequences that leads to fast correlation algorithm.
    (2) Trial production of code generator and correlator
    The code generator using ROM and correlator using FPGA corresponding to 10,000 logic gates are implemented for the aproximated integer sequence from the real-valued shift-orthogonal finite-length sequence of length 33.
    The combining operation of 8-bit generator output and 8-bit correlator input presents 16Mchips/s rate and correlation pulse of 1% error.
    (3) Experiment of CDMA transmission
    The experiment of optical and spatial multiplexing transmission based on two real-valued finite-length sequences shows that 0dB D/U ratio at the correlator input is improved to 40dB D/U ratio at its output, satisfying the orthogonality within allowable error.

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Teaching Experience

  • Digital Signal Processing for Communications

    2022.4
    Institution:Kagoshima University

  • Information Theory

    2021.4
    Institution:Kagoshima University

  • Discrete Mathematics and Logic Circuit

    2021.4
    Institution:Kagoshima University

  • Signal Processing

    2017.4
    -
    2021.3
    Institution:Yamaguchi University

  • Advanced Digital Signal Processing

    2016.4
    Institution:Yamaguchi University

  • Information Communications Engineering

    2016.4
    -
    2021.3
    Institution:Yamaguchi University

  • Advanced Information Network

    2012.4
    -
    2016.3
    Institution:Yamaguchi University

  • Advanced Coding Theory in Digital Communications

    2010.4
    -
    2021.3
    Institution:Yamaguchi University

  • Logic Circuit

    2010.4
    -
    2012.3
    Institution:Fukuoka Institute of Technology

  • Logic Design

    2009.4
    -
    2021.3
    Institution:Yamaguchi University

  • Reliable Systems Engineering

    2022.4
    Institution:Kagoshima University

  • Science, Technology and Society

    2022.4
    Institution:Kagoshima University

  • Sensing Technology in Bionics and Environment Engeneering

    2022.4
    Institution:Kagoshima University

  • Information Science and Biomedical Engineering Laboratory I

    2022.4
    Institution:Kagoshima University

  • Information System

    2021.4
    Institution:Kagoshima University

  • Internship

    2021.4
    Institution:Kagoshima University

  • Advanced Computer Science and Biomedical Engineering

    2021.4
    Institution:Kagoshima University

  • Information Engineering Laboratory IV

    2021.4
    Institution:Kagoshima University

  • Information Engineering Laboratory II

    2021.4
    Institution:Kagoshima University

  • Introduction of Engineering Education

    2020.4
    -
    2021.3
    Institution:Yamaguchi University

  • Advanced Topics in Information Systems Engineering II

    2016.4
    -
    2021.3
    Institution:Yamaguchi University

  • Introduction to Information Technology

    2016.4
    -
    2017.3
    Institution:Yamaguchi University

  • Digital Electronic Circuits

    2012.4
    -
    2013.3
    Institution:Yamaguchi University

  • Advanced Information Engineering Practice II

    2009.4
    -
    2012.3
    Institution:Yamaguchi University

  • IT Project Development I

    2008.4
    -
    2014.3
    Institution:Yamaguchi University

  • IT Project Development II

    2008.4
    -
    2014.3
    Institution:Yamaguchi University

  • Advanced Information Engineering Practice I

    2008.4
    -
    2012.3
    Institution:Yamaguchi University

  • Special Lecture of Product Innovation

    2008.4
    -
    2009.3
    Institution:Yamaguchi University

  • Design & Engineering PracticeⅠ

    2005.4
    -
    2009.3
    Institution:Yamaguchi University

  • Information Engineering Experiment and Practice III

    2002.4
    -
    2005.3
    Institution:Yamaguchi University

  • Information Engineering Experiment and Practice II

    1998.4
    -
    2020.3
    Institution:Yamaguchi University

  • Information Engineering Experiment and Practice I

    1998.4
    -
    2010.3
    Institution:Yamaguchi University

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