针对光谱相位编码光码分多址系统（OCDMA）的信息侦听技术进行了研究。
The information eavesdropping techniques of spectral phase-coded OCDMA system were investigated.
纠错编码技术可以提高光码分多址系统的频谱效率，并可以抑制频谱效率随码长的增加而减小的特性。
Error correction coding is used to increase the spectral efficiency, and it can avoid the spectral decrease with the increase of the length.
仿真研究了传输信道和光功率对光码分多址系统性能的影响，分析了传输距离、光纤色散系数、光纤衰减、入纤光功率等与误码率和Q值的关系。
The influences of length, dispersion index and attenuation index of transmission fiber and incident optical power on ber (bit error rate) and Q value of the system is analyzed.
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