Analysis of Optical PPM/CDMA System with M-Ary Convolutional Coding

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概要

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• copyright(c)1999 IEICE許諾番号：08RB0011　http://search.ieice.org/index.htmlOptical Code Division Multiple Access (OCD- MA) has been emerging as an attractive scheme in fiber optic communication systems as well as in space communication systems in past few years. In OCDMA systems, M-ary Pulse Position Modulation (PPM), has been regarded as an efficient signalling format which has the capability to reduce the channel interference caused by the other users and also to increase the number of simultaneous users. We apply error control coding to improve the system performance of pulse position modulated OCDMA (PPM/OCDMA) systems and this paper investigates the performance of M-ary PPM/OCDMA systems with M-ary 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 users 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.

• 社団法人電子情報通信学会の論文
• 1999-10-25

著者

• Yashima H

  Saitama Univ. Saitama Jpn

• Yashima Hiroyuki

  Department Of Management Science Tokyo University Of Science

• PASQUAL Hemali

  Department of Information and Computer Sciences, Saitama University

• Pasqual Hemali

  Department Of Information And Computer Sciences Saitama University

• Yashima Hiroyuki

  Department Of Information And Computer Sciences Saitama University

関連論文

• Analysis of Optical PPM/CDMA System with M-Ary Convolutional Coding
• Performance Analysis of MDSS Code Acquisition Using SLS for Optical CDMA Systems(Fiber-Optic Transmission for Communications)
• Performance Analysis of Coherent Ultrashort Light Pulse CDMA Communication Systems with Nonlinear Optical Thresholder(Fiber-Optic Transmission for Communications)
• Dispersion Compensation for Ultrashort Light Pulse CDMA Communication Systems (Regular section)
• Improvement of Coherent Ultrashort Light Pulse CDMA Communication Systems with Distinct 4-Level m-Sequences(Wide Band Systems)
• On the Code Synchronization of PPM/OPPM Fiber-Optic CDMA Systems(Wide Band Systems)

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