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多维地址码对OCDMA系统性能的影响
王海潼,马彩虹,葛海波
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(武警工程学院通信工程系，西安 710086;西安邮电学院电信系，西安 710061)

摘要:

讨论了一维/二维二次素数码、光正交码的构造过程、相关性、容量等特性，分析了它们对光码分多址(OCDMA)系统误码性能和用户容量的影响。为得到不同码字与不同维数码字对OCDMA系统的误码率影响程度，仿真比较了一维、二维二次素数码和一维、二维光正交码之间的误码率与同步用户数的关系以及二维素数码与二维光正交码的误码率与同步用户之间的关系。结果表明：二维误码性能高出一维码误码性能几个数量级；二维素数码在并发用户数较少时，优于二维光正交码，并发用户较多时，其误码率相当。研究结果对实际系统中不同条件下选择码字提供了参考。

关键词: 光码分多址通信系统多维地址码二次素数码光正交码误码率性能

DOI：

基金项目:武警工程学院基础研究计划项目（WJY201018）

Influence of multiple dimensional address code on performance of OCDMA systems

WANG Hai-tong,MA Cai-hong,GE Hai-bo

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Abstract:

The construction, correlation, capacity and other features o f one and twodimensional Synchronous Square Prime Codes(SSPCs) and Optical Ort hogonal Codes(OOCs) are discussed,their impacts on BER(Bit Error Rate) performance and u ser capacity of OCD MA(Optical Code Division Multiple Access) systems are analysed. In order to get the degree of influence of di fferent patterns and different dimensions codes on BER of OCDMA systems,relation ship between BER and number of simultaneous users of 1DSSPC and 2DSSPC, 1D OOC an d 2DOOC, 2DSSPC and 2DOOC are compared by simulation. Results show that BE R performance of twodimensional codes is several orders of magnitude higher than that of one dimensio na l, and 2DSSPC is better than 2DOOC with few simultaneous users while both ar e fairly with many simultaneous users. The results provide references for actual s y stem to select codeword under different conditions.

Key words: optical code division multiple access(OCDMA) system multiple dimensional addres s code SCPC OOC BER performance