不相关Rayleigh衰落信道仿真模型  

New Method for Generation of Multiple Uncorrelated Rayleigh Fading Waveforms

作　　者：罗志年[1,2] 张文军[2] 管云峰[2] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082 [2]上海交通大学电子工程系,上海数字媒体处理与传输重点实验室,海200240

出　　处：《系统仿真学报》2009年第13期3872-3875,共4页Journal of System Simulation

基　　金：国家自然科学基金重点项目(60332030)

摘　　要：用一个统一的公式对基于正弦波叠加(SoS)Rayleigh信道仿真方法进行了分类和总结,提出了一种产生多个不相关Rayleigh衰落信道的方法。基于SoS的Rayleigh信道仿真方法根据参数设置分为四类,每一类的正弦波的相位又有三种不同的定义方式。信道的统计特性和基本结构可以由信道的二阶统计量完全表征,根据对信道的二阶统计特性对比以及实际的物理散射传播环境的特点,第二类仿真方法同时具有平稳性和各态历经的优点,适合平坦信道的仿真建模;而第三类方法更适于多个不相关Rayleigh信道的生成,具有简单高效的特点。An improved Simulation model of Rayleigh Fading Channels was proposed for the generation of multiple uncorrelated Rayleighfading waveforms. First, the simulation models of flat Rayleigh fading channel were divided based on sum-of-sinusoids into four categories by a uniform framework, depending on whether the parameter sets （amplitudes, phases, or Doppler frequencies） were fixed or random in simulation trials. Furthermore, the mechanisms of the multipath radio propagation show that the fading phenomenon is a primary result of time variations in phases, and three methods were summarized altogether to define the specific initial phases for each category of the simulation models. For comparison purposes, the second-order statistics of different kinds of simulation models were proposed. Finally, a useful simulator based on Class III for generation of multiple independent Rayleigh fading waveforms was achieved, which outperformed the other techniques in terms of its accuracy and convergence rate.

关 键 词：正弦波叠加 RAYLEIGH衰落 广义平稳性 各态历经 

分 类 号：TN914.4[电子电信—通信与信息系统]