带turbo编码的光学PPM/CDMA系统的性能

Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI:10.1109/VETECF.1999.798472

J.Y. Kim, H. Poor

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引用次数: 9

摘要

本文对采用turbo编码的光学CDMA系统进行了性能分析和仿真。假设光通道是强度调制(IM)通道，采用直接检测方案对接收到的光信号进行检测。使用的调制方案是脉冲位置调制(PPM)。仿真结果表明，turbo编码具有较高的编码增益和合理的编解码复杂度。此外，还证明了在固定码率下，增加交织器长度和迭代次数可以大大提高光CDMA系统的性能。本文的结果可以应用于例如在室内环境中具有多址应用的光学无线局域网。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance of an optical PPM/CDMA system with turbo coding

In this paper, performance of an optical CDMA system with turbo coding is analyzed and simulated. It is assumed that the optical channel is an intensity-modulated (IM) channel and a direct-detection scheme is employed to detect the received optical signal. The modulation scheme used is pulse-position-modulation (PPM). From the simulation results, it is shown that turbo coding offers considerable coding gain with reasonable encoding/decoding complexity. Also, it is demonstrated that the performance of an optical CDMA system can be substantially improved by increasing the interleaver length and the number of iterations for a fixed code rate. The results in this paper can be applied, for example, to an optical wireless LAN operating in an indoor environment with multiple access applications.

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来源期刊

Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)

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