DS/CDMA多用户通信系统在AWGN信道下的仿真

Simulation of DS/CDMA Multiuser Communication Systems in AWGN Channel

采用 m序列作为扩频序列 ,利用蒙特卡罗方法和重要抽样技术对 DS/CDMA多用户通信系统在加性高斯白噪声信道下的误码率进行仿真研究。仿真结果表明 ,重要抽样技术仿真结果与蒙特卡罗方法仿真结果吻合得很好 ,并且在低误码率的情况下 ,与蒙特卡罗方法相比 ,重要抽样技术能显著降低运算量。

m sequences are used as spread spectrum sequences; Simulation of the biterrorrate(BER) performance of DS/CDMA multiuser systems in an additive Gaussian white noise channel is investigated by using MonteCarlo method and importance sampling technique. The results of simulation in computer show that importance sampling technique results are close agree MonteCarlo method results. On the other hand, importance sampling simulation can significantly reduce the computational cost required by using Monte Carlo simulation when the BER is very low.