中文说明：这里是瑞利信道仿真，采用mcm法进行仿真，采用经典功率谱进行描述，在最大多普勒频移方向（即0º和180º方向）多普勒功率谱为无穷，但是由于是连续分布的，所以取到某个具体的方向的概率为0
English Description：
This is the Rayleigh channel simulation, using MCM method to simulate, using the classical power spectrum to describe, in the direction of the maximum Doppler frequency shift (that is, 0 ° and 180 ° direction) Doppler power spectrum is infinite, but because it is continuous distribution, so the probability of taking a specific direction is 0