使用蒙特卡罗方法模拟AWGN信道中QPSK的数字BER，并附加QPSK_AWGN.m脚本。
修改具有ZF接收机的系统中的瑞利平坦衰落信道的情况的代码。 在同一个图中绘制其数值和分析BER。(Use the Monte Carlo method to simulate the numerical BER of QPSK in AWGN channels, with the QPSK_AWGN.m scr ipt attached.
Modify the code for the case of Rayleigh flat fading channel in a system with a ZF receiver. Plot its numerical and analytical BERs in the same graph.)