HFC-SCDMA抗汇聚噪声干扰能力的重点抽样仿真

基于MATLAB6．1平台，使用重点抽样（Importance Sampling)方法，对采用SCDMA体制的HFC上行信道抗汇聚噪声干扰的性能进行仿真，仿真中常用的Monte-Carlo方法由于受SCDMA系统巨大的计算量限制而不具有实用性，重点抽样技术是一种方差减少技术，它能显著地减少运算时间，SCDMA系统仿真同样的仿真精度条件下，重点抽样与Monte-Carlo仿真相比，重点抽样技术能显著地降低运算量。

Importance Sampling Simulation of the Noise Resisting Ability of HFC-SCDMA

Based on MATLAB6.1, simulation of the noise resisting ability of the uplink of HFC(Hybrid Fiber Coax) network using SCDMA scheme is performed. The common simulation method is Monte -Carlo,which is time-wasting.So Importance Sampling simulation is used to reduce the time of simulation. Under the same condition, Importance Sampling simulation can reduce the time of simulation remarkably in comparison with Monte-Carlo simulation.