计算机仿真无线Rice衰落信道的实现方法

Implementation method of wireless Rice fading channels with computer simulation

应用第一类零阶修正的贝塞尔函数I0 (x)一个近似式 ,推导Rice随机变量的概率分布函数 (CDF)的近似闭式。采用蒙特卡洛法用计算机仿真生成Rice分布的随机变量序列。Rice分布的PDF仿真结果与理论值比较表明 :两者是基本一致的。文中还介绍了采用此法来生成Nakagami m分布的随机变量序列 ,并给出仿真结果。该方法可以直接用于仿真Rice或Nakagami

Utilizing an approximate formula of the first kind zero-order modified Bessel function I0(x), an approximate closed form of cumulative distribution function (CDF) of a Rice random variable (RRV) is worked out. The RRVs are generated by Monte-Carlo method with computer simulation. By comparing simulated results with theoretical values for PDF of a RRV, it is shown that two resutls are basically accordant. Also, the simulated results of Nakagani-m distributed random variables is provided. The proposed method can be applied directly to the researches of transmission performance of wireless communication systems over the scenarios of Rice or Nakagami-m fading channels.