Frequency utilization efficiency improvement on superposed SSMA-QPSK signal transmission over high speed QPSK signals in nonlinear channels

Takatoshi Sugiyama, Hiroshi Kazama, Masahiro Morikura, Shuji Kubota, Shuzo Kato

研究成果: Article査読

11 被引用数 (Scopus)

抄録

This paper proposes a superposed SSMA (Spread Spectrum Multiple Access)-QPSK (Quadrature Phase Shift Keying) signal transmission scheme over high speed QPSK signals to achieve higher frequency utilization efficiency and to facilitate lower power transmitters for SSMA-QPSK signal transmission. Experimental results show that the proposed scheme which employs the coding-rate of one-half FEC (Forward Error Correction) and a newly proposed co-channel interference cancellation scheme for SSMA-QPSK signals can transmit twenty SSMA-QPSK channels simultaneously over a nonlinearly amplified high speed QPSK signal transmission channel and achieve as ten times SSMA channels transmission as that without co-channel interference cancellation when the SSMA-QPSK signal power to the high speed QPSK signal power ratio equals -30 dB. Moreover, cancellation feasibility generation of the interference signals replica through practical hardware implementation is clarified.

本文言語English
ページ(範囲)480-487
ページ数8
ジャーナルIEICE Transactions on Communications
E76-B
5
出版ステータスPublished - 1993 5 1
外部発表はい

ASJC Scopus subject areas

  • ソフトウェア
  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学

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