中文说明：
文件包含两个m文件，一个是QPSK的主函数文件和单径的瑞利衰落信道fade.m文件，实现的对qpsk的过程进行了仿真（在瑞利和高斯信道的作用下）。绘制出了在各个阶段的波形图
English Description：
The file contains two m files, one is the main function file of QPSK and the fade. M file of single path Rayleigh fading channel. The process of QPSK is simulated (under the action of Rayleigh and Gaussian channels). The waveforms at each stage are drawn < br / >