重要抽样技术中的一种新混合偏置法

A NEW BIASING PROCEDURE FOR IMPORTANCE SAMPLING

研究数字通信系统计算机仿真中误码率(Pe)估计的重要抽样法,提出了一种新的混合偏置技术,计算了最佳化参数,分析了性能。结果表明,与现有文献中提出的方法相比,采用该技术,在大多数情况下可以得到更好的估计性能;特别是在只知系统Pe的粗略值时,使用此技术具有明显的优越性。

The importance sampling in estimating the bit error rate (BER)of digital communication systems is studied using computer simulatiom methods. A new composite biasing procedure is also proposed, the optimum parametets are calculared and its estimation pcrformance is analyzed. comparing with previous biasing schemes, it is shown the new biasing scheme can offer greater sample size saving in most cases. In particular, considering the robustness with respect to the estimate of the unknown error probability, the NCIS technique has notable advantages over IIS and CIS techniques.