建立随机瑞利衰落信道，用于模拟移动通信过程中的信号接收过程(A random Rayleigh fading channel is used to simulate the signal reception process in mobile communication)

生成Rayleigh 分布的随机数，为信号在瑞利信道中传输，生成的瑞利衰落提供函数(The random number of Rayleigh distribution is generated to transmit the signal in Rayleigh channel and the generated Rayleigh fading provides functions)