Recognition of digital modulation signals based on high-order cumulants

In communication countermeasure, in order to efficiently interfere with the enemy, firstly we need to determine the modulation mode of enemy signals. This paper introduces a recognition algorithm of digital modulation signals which based on high-order cumulants. Due to the signals of 8PSK and MFSK have the same cumulants, we can´t recognize them directly. Meanwhile, the identify species of exiting method are few. So, in this paper a new method is proposed to solve the problems. The method not only has a high recognition ratio, but also it is simple and effective. And it can classify more modulation mode than exiting algorithm, including 2ASK/2PSK, 4ASK, 8ASK, 2FSK, 4FSK, 8FSK, 4PSK and 16QAM signals. The algorithm is verified by simulation results has better performance than the existing algorithm.