说明：  MPSK信号调制方式识别仿真,可产生B,4,8PSK信号加噪声进行仿真,学习信号分析的可以参考
(The modulation mode of MPSK signal can be recognized and simulated, and the signal of BP4 / 8PSK can be simulated with noise. The analysis of the learning signal can be referred to.)