利用高阶累积量实现数字调制信号的识别  

Recognition of Digital Modulation Signals via High-Order Cumulants

作　　者：郭娟娟[1] 尹洪东[1] 姜璐[1] 梅恒芳 

机构地区：[1]中国石油大学(北京)地球物理与信息工程学院,北京102249

出　　处：《通信技术》2014年第11期1255-1260,共6页Communications Technology

摘　　要：文中提出一种基于高阶累积量识别多种数字调制信号的算法。首先推导计算各信号的八阶累积量,从二、八阶累积量中提取一个特征参数,实现以更少参数识别更多信号的目的;然后,为提高MFSK的识别率,从微分后MFSK信号的四、六阶累积量中提取一个特征参数完成识别。仿真结果显示,通过利用这两个参数可以实现2ASK/BPSK、4ASK、8ASK、QPSK、8PSK、2FSK、4FSK、8FSK、16QAM、64QAM等多种数字调制信号的识别。An algorithm based on HOC（ high-order cumulants） for recognizing multiple digital modulation signals is proposed. The eight-order cumulants are firstly deduced and calculated,and one feature parameter extracted from two-order and eight-order cumulants is used to recognize more signals with less parameter. Then,in order to increase the recognition rate of MFSK signals,another feature parameter is picked up from four-order and six-order cumulants of MFSK signal. Simulation shows that numerous digital modulation signals such as 2ASK / BPSK,4ASK,8ASK,QPSK,8PSK,2FSK,4FSK,8FSK,16 QAM,64QAM can be identified by these two parameters.

关 键 词：调制识别 高阶累积量 特征参数 

分 类 号：TN911.72[电子电信—通信与信息系统]