Rayleigh衰落信道的仿真模型

Raylcigh衰落信道的仿真模型是许多信道仿真模型的基础。用一个统一的表达式归纳和总结了各种Rayleigh衰落信道仿真模型，根据表达式中参数的假设条件不同，将现有的仿真模型分为4类，分别讨论它们的均值、相关统计特性、平稳特性和各态历经特性。通过对这些仿真模型的比较分析，可以看出，各态历经特性与相关特性的匹配是一对矛盾，不能同时满足。在此基础上提出了一个高效的仿真模型应当满足的条件，这将有助于设计新的仿真模型。

Simulation Models for Rayleigh Fading Channels

Rayleigh fading channels are the foundation of all channel models. In this paper, several kinds of the simulation models of Rayleigh fading channels by a uniform expression are summarived. According to the differences among the assumed condition of the parameters in the expression, the simulation models fall into 4 classes. Discussion is also made of their mean, correlation, stationary and ergodicity. With the help of these discussions, it can be seen that the ergodicity and the fitting of the stationary can't exist simultaneously. Based on this, some conditions on an effective channel model are presented. And these conditions are useful to design the new effective channel models.