卫星单-混信号识别研究  

Research on Identification of Satellite Single-Mixed Signals

作　　者：彭闯 杨晓静 蔡晓霞 PENG Chuang;YANG Xiao-jing;CAI Xiao-xia(School of Electronic Countermeasure,National University of Defense Technology,Hefei 230037,China)

机构地区：[1]国防科技大学电子对抗学院

出　　处：《火力与指挥控制》2019年第8期29-33,40,共6页Fire Control & Command Control

基　　金：国家自然科学基金资助项目（61201379）

摘　　要：针对卫星通信中常用的调制信号和成对载波多址(PCMA)混叠信号的调制样式识别问题,提出了一种基于高阶累积量和信号瞬时特征统计量的识别算法。该算法对接收数据进行预处理,在此基础上提取高阶累积量和信号瞬时特征统计量构造4个特征参数,构造树形分类器进行调制识别。算法具有不需要知晓信号的定时等先验信息,对混合幅度比不敏感等特点。仿真结果表明,该算法在低信噪比下仍然能保持较高的识别性能。In view of the modulation identification problems of common used single signals and Paired Carrier Multiple Access(PCMA)mixed signals in satellite communication,the paper proposes a identification algorithm based on high-order cumulants and signal instantaneous characteristic statistics.After the pre-processing of received data,the algorithm extracts high-order cumulants and instantaneous characteristic statistics to form into 4 characteristic parameters and then to achieve a tree-shape classifier for modulation identification. This algorithm does not need any prior information about the timings of signals,and is non-sensitive for the mixture amplitude ratio. The simulation results show that under the low signal-to-noise ratio,the algorithm can achieve high identification capability.

关 键 词：卫星通信 成对载波多址 累积量 瞬时特征统计量 调制识别 

分 类 号：TP911[自动化与计算机技术]