这是自己下载的msk调制解调程序又加了个误码率-It is your own download msk modulation and demodulation process and added a bit error rate

使用频率平滑法将msk信号的循环谱画出来，并且可以通过循环谱求其载频-Using the frequency smoothing method, the loop spectrum of the MSK signal is drawn, and it can be used to find the carrier frequency