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1999 Fiscal Year Final Research Report Summary

Optical CDMA with Multibit Code for Many Multiplex Users

Research Project

Project/Area Number 09650397
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 情報通信工学
Research InstitutionSaitama University

Principal Investigator

YASHIMA Hiroyuki  Saitama University Faculty of Engineering Department of Information and Computer Sciences, Associate Professor, 工学部, 助教授 (30230197)

Project Period (FY) 1997 – 1999
KeywordsOptical Communication / Optical CDMA / error control code / PPM / convolutional code / Viterbi decoding / 音声
Research Abstract

1. Multibit Code for Optical CDMA
We have proposed a new class of code as signature sequences for optical Code Division Multiple Access (OCDMA) systems. OCDMA combined with F-ary Multibit/Sequence period has been investigated. We derive the performance of the proposed CDMA systems. It is shown that the proposed system achieves higher throughput, keeping advantage of the power efficiency and low bit error rate performances.
2. M-ary PPM with Multibit code
The multibit/Sequence period code has been applied in OCDMA with M-ary Pulse Position Modulation (PPM). In PPM signaling, interference from other users are reduced, which results in increase of simultaneous users. It is found that the proposed system achieves higher throughput, keeping advantage of low bit error rate.
3. OCDMA with Error Control Coding
We apply error control coding to improve the system performance of pulse position modulated OCDMA (PPM/OCDMA) systems and we investigate the performance of M-ary PPM/OCDMA systems with M-ary … More convolutional coding. Dual-k code is used as the M-ary convolutional code and Optical Orthogonal Codes with the maximum cross correlation value of 1 and 2 are employed as the signature sequences. We derive an expression for the bit error probability of the new system and show that combining M-ary convolutional coding and M-ary PPM results in an improved error performance. Also it is shown that the number of simultaneous user can be significantly increased with the proposed system compared to the uncoded PPM/OCDMA system with the same bit error probability and with the same information bit rate. We also analyze the system with binary convolutional coding and a comparison with the proposed system is given.
4. OCDMA with Prime Code
We investigate the performance of prime code in OCDMA systems. The correlation properties of primecode to derive BER in OCDMA. The value of the crosscorrelation between prime codes and its probability density function are analyzed. Bit error rate (BER) are, then, derived for the case of the worst choice of codes and also for the case of random choice. Simulation results show that the results obtained in the analysis provides well approximated BER. BER for prime code is compared with that for optical orthogonal code (OOC). IT is shown that prime code provides better performance than the OOC. Less

  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] 稲葉直彦、八嶋弘幸、坪内孝司: "レイリーフェージング通信路における最ゆうメトリックおよび近似メトリックを用いた8相PSKトレリス符号化変調方式の誤り率について"電子情報通信学会論文誌. A,Vol.J80-,No.3. 576-580 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Nishioka,H.Yashima,J.Suzuki and T.Ohtsuki: "PPM Multibits/Sequence-Period Optical Orthogonal CDMA Systems"IEEE International Symposium on Information Theory(ISIT). 482 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nanao,H.Yashima,J.Suzuki and T.Ohtsuki: "Optical PPM-CDMA Systems Using EWOC"1997 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM'97). vol.1. 14-17 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] SUZUKI J.,XINGDI B.,and YASHIMA H.: "Transmission of Data on Analog Speech Channel by Spread Spectrum Modulation"Proc.IEEE Pacific Rim Conf. Communications, Computers and Signal Processing. vol.2. 697-700 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] SHIMURA Y.,YASHIMA H.,and SUZUKI J.: "Bit Error Rate of RCPC Coded Optical PPM with Diversity Combining"Proc. Inter. Symp. Nonlinear Theory and Its Applications. vol.1. 109-112 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] WANG Q.ZENG M.,YASHIMA H.and SUZUKI J.: "Multiple-Symbol Detection of MPSK in Narrow-Band Interference and AWGN"IEEE Transactions on Communications. vol.46,No.4. 460-463 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 志村弦、八嶋弘幸、鈴木誠史: "プライム符号の相互相関特性の解析と光CDMAシステムにおけるビット誤り率"電子情報通信学会論文誌. vol.J81-A,No.10. 1431-1441 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] NANAO S.,YASHIMA H.,and SUZUKI J.: "Optical CDMA Systems with EWO Signaling and RTT"Int. Symp. on Information Theory and its Applications. vol.2. 514-517 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] PASQUAL H,YASHIMA H.and SUZUKI J.: "Analysis of Optical PPM/CDMA System with M-ary Convolutional Coding"Int. Symp. on Information Theory and its Applications. vol.2. 518-521 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yashima H.Shimura Y.and Suzuki J.: "The Performance of Prime Code in Optical CDMA Systems"The 6th IEEE Int. Workshop on Intelligent Signal Processing and Communication Systems. vol.1. 148-152 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hayashi Y.and Yashima H.: "Optical CDMA System Using BCH Coded with Side Information Based on The Received Optical Power"1999 IEEE International Conference on Personal Wireless Communications. 255-258 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Suzuki J.,Kobayashi H.and Yashima H.: "Presentation of ultrasonic virtual environment by use of characteristics of digital sound"IEEE International Conference on Consumer Electronics. 138-139 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yamazaki T.,Sanada Y.,Yashima H.,Ohtsuki T.,Morohashi T.: "Performance of Coded Multicarrier Modulation on a Gilbert Channel"The Second International Symposium on Wireless Personal Multimedia Communications. 277-281 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Pasqual H.and Yashima H.: "Analysis of Optical PPM/CDMA system with M-Ary Convolutional Coding"IEICE Transactions on Commun.. vol.E82-B,No.10. 1618-1625 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 三好徹哉、西岡隆、八嶋弘幸、稲葉直彦、鈴木誠史: "多ビット送信シーケンスを用いたPPM光CDMAシステムの特性解析"電子情報通信学会論文誌. vol.J83-B, No.1. 1-13 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 八嶋弘幸: "光空間通信ネットワークにおける変復調技術"オプトロニクス. No.215. 143-146 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Inaba N., Yashima H., Tsubouchi K.: "Error Performances of 8-PSK Trellis Modulation Using the Maximum Likelihood Metric and an Approximated Metric over Rayleigh Fading Channel"IEICE Transactions. Vol.J80-A,No.3. 576-580 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Nishioka, H.Yashima, Jouji Suzuki and Tomoaki Ohtsuki: "PPM Multibits/Sequence-Period Optical Orthogonal CDMA Systems"IEEE International Symposium on Information Theory (ISIT). 482 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Nanao, H.Yashima, J.Suzuki and T.Ohtsuki: "Optical PPM-CDMA Systems Using EWOC"1997 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing. vol.1. 14-17 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] SUZUKI J., XINGDI B., and YASHIMA H.: "Transmission of Data on Analog Speech Channel by Spread Spectrum Modulation"Proc. IEEE Pacific Rim Conf. Communications, Computers and Signal Processing. vol.2. 697-700 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] SHIMURA Y., YASHIMA H., and SUZUKI J.: "Bit Error Rate of RCPC Coded Optical PPM with Diversity Combining"Proc. Inter. Symp. Nonlinear Theory and Its Applications. 109-112 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] WANG Q. ZENG M., YASHIMA H. and SUZUKI J.: "Multiple-Symbol Detection of MPSK in Narrow-Band Interference and AWGN"IEEE Transactions on Commun. vol.46, No.4. 460-463 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shimura Y., Yashima H. and Suzuki J.: "An Analysis of Crosscorrelation Property of Prime Code and Bit Error Rate in Optical CDMA System"IEICE Transactions. vol.J81-A, No.10. 1431-1441 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] NANAO S., YASHIMA H. and SUZUKI J.: "Optical CDMA Systems with EWO Signaling and RTT"Int. Symp. on Information Theory and its Applications. vol.2. 514-517 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] PASQUAL H, YASHIMA H. and SUZUKI J.: "Analysis of Optical PPM/CDMA System with M-ary Convolutional Coding"Int. Symp. on Information Theory and its Applications. vol.2. 518-521 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yashima H. Shimura Y. and Suzuki J.: "The Performance of Prime Code in Optical CDMA Systems"The 6th IEEE Int. Workshop on Intelligent Signal Processing and Communication Systems. vol.1. 148-152 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hayashi Y. and Yashima H.: "Optical CDMA System Using BCH Codes with Side Information Based on The Received Optical Power."1999 IEEE International Conference on Personal Wireless Communications. 255-258 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Suzuki J., Kobayashi H. and Yashima H.: "Presentation of ultrasonic virtual environment by use of characteristics of digital sound"IEEE International Conference on Consumer Electronics. 138-139 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yamazaki T., Sanada Y., Yashima H., Ohtsuki T., Morohashi T. and Araki K.: "Performance of Coded Multicarrier Modulation on a Gilbert Channel"The Second International Symposium on Wireless Personal Multimedia Communications. 277-281 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Pasqual H. and Yashima H.: "Analysis of Optical PPM/CDMA System with M-Ary Convolutional Coding"IEICE Transactions on Commun. vol.E82-B, No.10. 1618-1625 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Miyoshi T., Nishioka T., Yashima H., Inaba N., Suzuki J. and Yamada Y.: "Performance Analysis of PPM Multi-Bits/Sequence-Period Optical CDMA System"IEICE Transactions. vol.J83-B,No.1. 1-13 (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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