首先给出了希尔波特解调过程，研究了相位编码信号的识别算法，接着对识别过程中存在的相位模糊问题提出了针对性的解决方法。基于上述算法，文中对二相编码信号、四相编码信号及多相码调制信号进行了仿真试验，得到了较好的效果，验证了文中算法的正确性和有效性，最后将算法应用于某雷达接收机的测试系统中，验证了其经济性和实用性。

In many special situations, the estimation of the modulation parameters and the automatic analysis of Intra-pulse modulation characteristics are especially important. Based on hilbert demodulation, a new recognizing algorithm of the poly-phase modulated signal is proposed. The resolution method for phase ambiguity during the period of recognizing is presented. The correctness and validity of the algorithm is shown by the computer simulation of the BPSK, QPSK and MPSK, which shows good prospect. The economic and practical performance of the algorithm is also proved by the testing of radar receiver in the ATE system.

TN957