Direct Sequence Code Division Multiple Access With Optical Multicarriers and Parallel FEC Codes

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概要

• 論文の詳細を見る

• We propose Direct Sequence CDMA with Optical Multicarriers and Parallel Forward Error Correcting(PFEC)coding technique. Proposed DS-CDMA with OPTICAL MULTICARRIERS, is new in lightwave systems and its alliance with PARALLEL FEC codes, makes it further unique. Optical multicarriers approach is effective to increase throughput by combating dispersion and ISI(Intersymbol Interference), whereas FEC is effective to increase reliability by diluting interactions among optical multicarriers. Till now, both techniques in lightwave systems have been discouraged. The former because of the wandering effect of optical multicarriers owing to unstability of laser diodes and later because it involves insertion of parity bits that changes data rate and results in insertion distortion that is not desirable in optical systems. To avoid change due to spreading code we also propose to take spreading code equal to serial to parallel converted streams. It bounds initial data(before S/P conversion)to data per carrier(after S/P conversion and spreading)on one hand and relaxes the requirement of high speed electronics on the other. The alliance of optical multicarriers with suitably applied FEC that we refer as Parallel FEC(PFEC)is effective as the beneficial aspects of each mitigate the shortcomings of the other and make the system practicable. Theoretical treatment confirms that the proposed approach is fundamentally sound and holds the potential for promising network performance.

• 一般社団法人電子情報通信学会の論文
• 1998-04-25

著者

• Nakagawa Masao

  The Authors Are With The Department Of Electrical Engineering Keio University

• YAQUB Raziq

  The authors are with the Department of Electrical Engineering, Keio University

• Yaqub Raziq

  The Authors Are With The Department Of Electrical Engineering Keio University

関連論文

• Optical Parallel Transmission with Multi-Wavelength for High Speed Communications on Indoor Channels
• Direct Sequence Code Division Multiple Access With Optical Multicarriers and Parallel FEC Codes

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