使用高阶累积量对MPSK信号进行调制识别，包括调制，解调，信噪比计算，最大似然（ML）准则和最大后验概率（MAP）准则。- Using high-order cumulants of MPSK signal modulation recognition, Includes the modulation, demodulation, signal to noise ratio calculation, Maximum Likelihood (ML) criteria and maximum a p