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随着相位编解码器关键技术的突破,相干光码分多址(OCDMA)系统也受到更多关注。采用前向纠错(BCH)信道编码技术,分析了相位编码光码分多址系统误比特率的计算方法,定义了相干OCDMA系统的频谱效率,讨论了系统端到端误比特率和平均丢包率的计算及其影响因素。得到使用BCH信道编码可以降低系统的误比特率和提高系统频谱效率的结论,并证明相位编码OCDMA系统适合传输变长数据包,网络中节点数目的增加对其误比特率影响不大。
With the breakthrough of key technologies of phase codec, coherent optical code division multiple access (OCDMA) system has also received more attention. By using forward error correction (BCH) channel coding technique, the method of calculating the bit error rate of phase-coded optical code division multiple access system is analyzed and the spectrum efficiency of coherent OCDMA system is defined. The system end-to-end bit error rate and average loss Calculation of the bag ratio and its influential factors. BCH channel coding can be used to reduce the system bit error rate and improve the system spectral efficiency conclusion, and prove phase encoding OCDMA system suitable for transmitting variable length data packets, the increase in the number of nodes on the network bit error rate bit.