MWOCDMA与WDM+OCDMA系统的性能分析

Performance Analysis of MW OCDMA and WDM+OCDMA Systems

使用高斯近似法分析和比较了多波长光码分多址 ( MW OCDMA)与波分复用 + OCDMA(即 WDM+ OCDMA)系统的误码率性能 ,两种系统使用的地址码是素数码及其构成的二维光正交码 ,并且假定 WDM+ OCDMA系统存在能均匀分配有效波长的中央控制器 .结果表明 ,无论同时使用的用户数较多、中等或较少 ,WDM+ OCDMA系统的误码率性能均优于 MW OCDMA系统 .

The BER performances of MW OCDMA and WDM+OCDMA systems were analyzed and compared employing Gaussian probability. These two systems use prime sequence and its two dimensional optical orthogonal codes, and also assume that WDM+OCDMA scheme exits a central controller to uniformly distribute all available wavelengths. The analysis results show that whether simultaneous users are large, medium or small, the BER performance of WDM+OCDMA scheme is always better than that of MW OCDMA system.