16-QAM信号的最佳干扰分析  

Analysis on optimal jamming against 16-QAM Signal

作　　者：孙志国[1,2] 徐天宇 邓昌青 宁晓燕 郭黎利[1] SUN Zhiguo;XU Tianyu;DENG Changqing;NING Xiaoyan;GUO Lili(College of Inforlnation and Communication Engineering,Harbin Engineering University,Harbin 150001,China;Tianjin 712 Communication ＆ Broadcasting Shareholding Co.,Ltd.,Tianjin 300462,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]天津七一二通信广播股份有限公司,天津300462

出　　处：《哈尔滨工程大学学报》2018年第7期1245-1250,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(61401196)

摘　　要：依托高效能电子战的背景,针对其缺乏理论依据的问题,本文从理论上分析了正交幅度调制(quadrature amplitude modulation,QAM)的最佳干扰样式,推导了信道为AWGN信道时M-QAM在二维数字调制干扰下的误码率通式,研究了基于凸分析的16-QAM通信系统的最佳干扰样式以及在最佳干扰下16-QAM通信系统的传输性能,分析了相位差、时延差对干扰效能的影响。仿真实验结果验证了M-QAM在二维数字调制干扰下的误码率公式的准确性,且理论分析和仿真实验均表明了当干信比大于-3 dB时,16-QAM通信系统的最佳干扰样式为QPSK。Electronic jamming has shown a high efficiency in electronic warfare; however,only few theoretical analyses have been conducted on optimal jamming. In this paper,the optimal jamming against a quadrature amplitude modulation（QAM） signal is theoretically analyzed. A general formula is deduced for the bit error rate（BER） of an M-QAM signal under a two-dimensional digital modulation jamming over an additive white Gaussian noise（AWGN）channel. The optimal jamming against a 16-QAM communication system based on convex analysis is studied. In addition,the transmission performance of a 16-QAM communication system under the optimal jamming is studied. The effects of phase difference and time delay difference on the jamming performance is also analyzed. The simulation experiment results verify the accuracy of the BER formula of an M-QAM signal under a two-dimensional digital modulation jamming. Both the theoretical analysis and the simulation experiments show that quadrature phase shift keying（QPSK） is the optimal jamming against a 16-QAM communication system when the jamming-to-signal ratio is larger than-3 dB.

关 键 词：干扰 最优化 误码率 干扰策略 加性噪声 数字通信系统 正交幅度调制 

分 类 号：TN911.6[电子电信—通信与信息系统]