群速度色散对二维异步OCDMA系统误码率的影响

Group Velocity Dispersion on the BER of 2D Asynchronous OCDMA System

基于理想情况下一维异步光码分多址系统误码率的定义及其计算公式,导出二维异步光码分多址系统误码率的计算公式,给出了考虑群速度色散效应后系统误码率的表达式。采用数值模拟的方法,取得了二维异步光码分多址系统误码率与传输距离的关系曲线和与用户数关系曲线。数值结果表明,群速度色散会严重影响二维光码分多址系统的性能。

Based on the ideal case of one-dimensional asynchronous OCDMA system bit error rate definition and calculation formula are derived,we get a two-dimensional asynchronous OCDMA system bit error rate calculation formula,considering the effect of group velocity dispersion after the system BER expressions.Using numerical simulation method,we obtain bit error rate of two asynchronous OCDMA system with the transmission distance relationship curves and the relation curves of users.The numerical results show that: the group velocity dispersion will seriously affect the two-dimensional optical CDMA system performance.