远距无线通信系统中杂波信号的抑制方法研究  

Research on suppression method of clutter signal in long distance wireless communication system

作　　者：肖博 刘超 李颖 高文鹏 丁燃 XIAO Bo;LIU Chao;LI Ying;GAO Wenpeng;DING Ran(Information Communication Company of State Grid Gansu Electric Power Company,Lanzhou 730050,China;State Grid Siji Feitian(Lanzhou)Cloud Technology Co.,Ltd.,Lanzhou 730300,China)

机构地区：[1]国网甘肃省电力公司信息通信公司,甘肃兰州730050 [2]国网思极飞天(兰州)云数科技有限公司,甘肃兰州730300

出　　处：《电子设计工程》2022年第9期71-74,81,共5页Electronic Design Engineering

基　　金：国网甘肃省电力公司经济技术研究院科技项目(SGGSJYOOPSWT2000063)。

摘　　要：现有无线通信系统杂波信号抑制方法中存在误比特率高、杂波信号相关性较强、杂波抑制能力较差等问题,基于此,提出远距无线通信系统杂波信号抑制方法。通过信号转换系统叠加基带中信号杂波,并在接收端通过低通滤波器恢复为基带语音信号。构建杂波信号的相位编码模型,相位编码可以将杂波白化,分解特征值得到特征向量;以此为基础,构建两行矩阵,根据白化处理后特征向量分散自相关性不发生变化的原理,分析两行矩阵中数据相关性,通过奇异值对比,分离杂波信号子集,实现杂波信号的抑制。实验结果表明,所提方法可降低杂波信号误比特率,降低杂波与回波的相关性,杂波信号抑制能力更好。There are some problems in the existing methods of clutter suppression in wireless communication system,such as high bit error rate,strong correlation of clutter signal,poor clutter suppression ability and so on.Based on this,a clutter suppression method for long-distance wireless communication system is proposed.The signal clutter in baseband is superimposed by signal conversion system,and the baseband voice signal is recovered by low-pass filter at the receiving end.The phase coding model of clutter signal is constructed.The phase coding can whiten the clutter and decompose the feature value to the feature vector;Based on this,two-line matrix is constructed.According to the principle that the eigenvector does not change after whitening,the correlation of data in two-line matrix is analyzed.Through the comparison of singular values,the clutter signal subset is separated to realize the suppression of clutter signal.Experimental results show that the proposed method can reduce the bit error rate of clutter signal,reduce the correlation between clutter and echo,and has better clutter suppression ability.

关 键 词：远距无线通信 杂波信号 抑制方法 通信信号 奇异值 

分 类 号：TN97[电子电信—信号与信息处理]