通信系统仿真实现QAM星座图，插值后Q、I信号波形图，加入高斯白噪声Q、I信号波形，经过匹配滤波后的波形，误码率曲线-Communication Systems Simulation QAM constellations, interpolated Q, I signal waveforms by adding Gaussian white noise Q, I waveform, after matched filtering of the waveform, the error rate c

本程序实现了用匹配滤波检测接收信号，并对接收信号进行实时解调同时显示信号的波形，共有四个进程并行运行，提高了运行效率-The program matched filtering detection of the received signal, and receive real-time signal demodulation at the same time to display the signal waveform, a total of four processes running in

1.先运行2_28_1再运行3_3_1判断PSK调制方式，得到精确频偏以及符号速率（这里只针对QPSK） 2.根据精确载频以及符号速率运行3_3_2进行匹配滤波 3. 3_3_2进行QPSK解调 4. 未给定信号-1. First Run 2_28_1 run 3_3_1 judge PSK modulation scheme to obtain accurate frequency offset and symbol rate (here only for QPSK) 2. dep