单信道时频重叠MPSK信号的调制识别方法

Modulation Recognition Method for Single-Channel Time-Frequency Overlapped MPSK Signals

提出一种基于高阶循环累积量的调制识别算法,用于解决单信道两个时频重叠M PSK信号的调制识别问题。对接收到的重叠信号进行预处理,计算其四阶循环累积量,提取分类特征参数,采用最小误差准则算法实现时频重叠双信号的自动分类。理论分析和仿真试验结果均证明了算法的正确性和有效性。

To solve the problems in modulation recognition of two time-frequency overlapped MPSK signals in the single-channel, An algorithm based on cyclic cumulants used modulation recognition is presented. Through computing the fourth-orders cyclic eumulants of pretreated overlapped signals, the feature parameter for classification was extracted, then use the minimum-error criterion to classify the two time-frequency overlapped signals automaticly. Theoretical analysis and experiment results both verify that the algorithm is correct and efficient.