说明：  PSK调制程序，是在原来的bpsk的基础上改的，并在程序中添加了求功率谱和自相关函数 里面有个子函数oversamp是自己定义的
(PSK modulation process, is in the original basis of BPSK changed and added in the procedure for power spectrum and autocorrelation function oversamp there are sub-function is defined in its own)