具有双极性的非相干OCDMA系统性能分析  

Analysis for the Performance of a Non-Coherent OCDMA System with Bipolarity

作　　者：马君显[1] 杜春雷[2] 杨淑雯[1] 李文宇[1] 

机构地区：[1]深圳大学信息工程学院,广东深圳518060 [2]中国科学院光电技术研究所微细加工光学技术国家重点实验室,四川成都610209

出　　处：《光电工程》2003年第5期15-17,36,共4页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(69982006及6013240); 国家微光学加工技术重点实验室支持项目。

摘　　要：提出了一种可减少多址干扰的非相干OCDMA编解码方案,该方案利用光开关控制2个单极性编码器和1个具有平衡互补结构的解码器,在1个光学信道上实现了双极性OCDMA信号传输;分析了电光编码、传输、解码、光电转换等环节的信号变化,推导出系统的噪声和误码率公式;与其它CDMA方案比较表明本方案在误码率方面可达到电域双极性CDMA系统的水平。A non-coherent OCDMA en coding and decoding scheme that can reduce multi-address interference is proposed. By using light switch to control 2 single polarity encoders and a decoder with balance complementary structure, bipolarity OCDMA signal transmission is realized in an optical channel. The signal variations in the links such as electro-optical coding, transmission, decoding and electro-optical conversion are analyzed. The formulae for system noise and error rate are derived. The comparison with the other CDMA schemes shows that error rate of the scheme has attained the level of CDMA system with bipolarity in electric field.

关 键 词：光码分复用 光开关 光延迟线 双极性 

分 类 号：TN914.53[电子电信—通信与信息系统]