無線通訊中的環境大多為頻率平坦衰弱通道或是頻率選擇性衰弱通道.瑞利分佈為大多延研究的模型,當有多信道輸入

時,其包跡的選擇可以用來測試通道~-Wireless communication frequency in the environment, mostly flat or frequency selective channel debilitating weakness channel. Rayleigh distribution model for most of the extension study, when there are multi-channel input, its envelope can be used to test the choice of channels ~