说明：  实现了无线通信中需要使用的信道模型，分析各种模型下的输入信号后的仿真和分析
(On the basis of the study in multi-path propagation theory, characteristics and mathematics models of wireless channels, and the analysis of references from both domestic and international realm, this thesis will generalize the detailed classification of wireless mobile communication channels, and the typical small-scale fading modules (Rayleigh fading and Rice fading), which the signals has encountered while transmitted in communication channels. )