一个通信系统仿真，包括AM调制与解调，在接收机见加入衰落并进行自动增益控制-A communication system simulation, including AM modulation and demodulation in the receiver to join fading and see for AGC

i have simulated a general ofdm system but i am not having correct results. can any one rectify problems in this code. have i used correct formulas in this code? i mean does RAYLEIGHCHAN command hold for it? do i need to equalize the receiver signal?