基于小波降噪和盲源分离的跳频通信抗干扰方法研究  

Anti-jamming method for frequency hopping communication based on BSS and wavelet denoising

作　　者：齐扬阳 于淼 关志强[3] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]南京电讯技术研究所,江苏南京210007 [3]沈阳军区军训器材研究所,辽宁沈阳110035

出　　处：《南京邮电大学学报（自然科学版）》2015年第1期72-78,共7页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61179006);江苏省自然科学基金(BK20141068)资助项目

摘　　要：传统盲源分离技术中白化处理的降噪能力有限,导致其在低信噪比条件下效果不理想,制约了盲源分离技术在通信抗干扰领域的实际运用。针对这一问题,在基于盲源分离的跳频通信抗非相关干扰方法的框架基础上引入小波降噪,提出了对混有干扰的多路接收跳频信号先小波降噪预处理再盲源分离的方法。仿真结果表明,提出方法与已有的类似工作相比,能够在低信噪比条件下进一步改善跳频通信对抗强非相关干扰的误码性能。The denoising ability of whitening procedure is limited,so the performance of traditional blind source separation（ BSS） is severely affected by the noise level,holding back the application of BSS in communication anti-jamming domain. In view of this,a wavelet denoising technique is introduced as a pre-processing unit into the basic model of BSS-based frequency hopping（ FH） anti-jamming against uncorrelated jamming. Firstly,wavelet denoising is used to enhance the signal to noise ratio（ SNR） of the received signals,which are the mixture of jamming and the FH signal. Then,BSS is utilized to extract the desired FH signal. Simulation results indicate that the method is valid for multiple kinds of hostile uncorrelated jammings and exhibits superior performance when the SNR is lower.

关 键 词：跳频通信 盲源分离 小波降噪 部分频带阻塞干扰 扫频干扰 

分 类 号：TN911.7[电子电信—通信与信息系统]