The research of atmospheric 2D optical PPM CDMA system with Turbo coding

被引：0

作者：

Zhou, Xiuli ^{[1
]}

Li, Zaoxia ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Peoples R China

来源：

OPTICAL TRANSMISSION, SWITCHING, AND SUBSYSTEMS V, PTS 1 AND 2 | 2007年 / 6783卷

关键词：

optical CDMA; atmosphere; PPM; turbo-encoded;

D O I：

10.1117/12.730604

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The atmospheric two-dimensional optical code-division multiple-access (CDMA) systems using pulse-position modulation (PPM) and Turbo-coded were presented. We analyzed the bit-error rate (BER) of the proposed system using pulse-position modulation (PPM) with considering the effects of the scintillation, avalanche photodiode noise, thermal noise, and multi-user interference. We showed that the atmospheric two dimensional (2D) optical PPM CDMA systems can realize high-speed communications when the logarithm variance of the scintillation is less than 0. 1, and the turbo-coded atmospheric optical CDMA system has better bit error rate(BER) performance than the atmospheric optical PPM CDMA systems without turbo-coded. We also showed that the turbo-coded system has better performance than the multi-user detection system.

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