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数字通信调制方式识别一直是信号截获处理方面的热点课题,是信号筛选和解调的基础,在通信对抗中意义重大。本文提出了以接收信号的四、六阶累量为特征来识别数字调制信号,文中进行了理论推导,并做了仿真验证该方法的可行性,实现了对2A SK/2PSK、4A SK、8A SK、4PSK、8PSK、16SQAM等数字调制类型识别。
Digital communication modulation mode identification has been a hot topic in signal interception processing, which is the basis of signal screening and demodulation. It is of great significance in communication confrontation. In this paper, it is proposed to identify the digital modulated signals by taking the fourth and sixth order cumulants of the received signal as features. The theoretical derivation is made and the feasibility of this method is verified through simulation. The proposed algorithm realizes the optimization of 2A SK / 2PSK, 4A SK, 8A SK, 4PSK, 8PSK, 16SQAM and other digital modulation type identification.