This method analyzes the cyclostationary of pretreated signals.In order to realize quadrature demodulation, the 4th-order cyclic cumulant is used to estimate carrier frequency and phase deviation.

• 通过对预处理后的MPSK信号进行循环平稳分析，利用已调信号的4阶循环累积量估计载波频率和初始相位偏差以便实现正交解调。