纠错编码对多速率OCDMA系统性能的改善  

Improvement performance of multirate OCDMA system based on error correction coding

作　　者：王守源[1] 余重秀[1] 张琦[1] 康步青[1] 

机构地区：[1]北京邮电大学电子工程学院,北京100876

出　　处：《光学技术》2006年第2期257-259,262,共4页Optical Technique

基　　金：国家自然科学基金资助项目(60177018)

摘　　要：将纠错编码(ECC)和素数跳频码技术结合起来,研究了基于纠错编码的多速率OCDMA系统的结构方案,并对未进行纠错编码的多速率OCDMA系统及经过纠错编码的多速率OCDMA系统的误码性能进行了模拟分析和比较。结果表明:如果两系统使用相同码长的光地址码,则经过纠错的编码系统同未经过纠错的编码系统相比,其误码率有了明显的改善;在保持两系统信息传输速率和码片间隔相等的条件下,恰当地选取纠错编码系统的码长,不仅误码性能可得到改善,而且可降低编码器和解码器的制作难度和成本。By integrating error correction coding（ECC） with prime-hop code technology , the scheme of multirate OCDMA with ECC was investigated, the performance of BER of uncoded system and coded one was simulated and compared. The results show that the performance of BER of coded system has a large improvement versus uncoded one when the two systems have same code length; when taking same bit rate and same chip interval , the BER of coded system is improved versus the uncoded one, and the difficulty and cost of fabrication for FBG ended and decoder are reduced with proper code length.

关 键 词：光码分多址(OCDMA) 纠错编码(ECC) 光纤布拉格光栅(FBG) 误码率(BER) 

分 类 号：TN929.11[电子电信—通信与信息系统]