基于压缩感知的DS扩频多径信号接收  

DS Spread Spectrum Multipath Signal Receiving Based on Compressive Sensing

作　　者：张进波[1] 程剑[2] 张剑[2] 杨雷[1] 

机构地区：[1]解放军理工大学通信工程学院研究生2队,江苏南京210007 [2]解放军理工大学通信工程学院

出　　处：《军事通信技术》2014年第2期40-44,共5页Journal of Military Communications Technology

基　　金：国家自然科学基金资助项目(61032004);国家高技术研究发展计划资助项目(2012AA121605;2012AA01A503;2012AA01A510)

摘　　要：卫星移动通信信道呈现出复杂的时变衰落特性,接收信号不可避免地受到多径衰落和遮蔽衰落(即阴影效应)的影响,影响了信号接收误码性能。文中基于接收端信号特征,将压缩感知应用于DS扩频多径信号的接收,以低于Nyquist速率对信号进行采样,通过压缩采样与稀疏恢复,提取信号中主要多径分量,实现信号的精确重构,提高DS扩频多径信号的接收误码性能。Satellite mobile communication channel presents a complex time-varying fading. The receiving signal is inevitably affected by multipath fading and shadow fading （namely shadow effect） which have a bad impact on the signal receiving BER. Based on the characteristics of the receiving signal, Compressive Sensing （CS） was applied to the receiver of DS spread spectrum multipath signal. With this method, signal sampled below the Nyquist rate, and the main signal multipath components were achieved by the reconstruction algorithm. So, the signal is recon- structed precisely and the signal receiving BER performance is improved.

关 键 词：压缩感知 多径 重构算法 

分 类 号：TN911.7[电子电信—通信与信息系统]