基于时间反演的目标信号稀疏检测方案  

Target Signal Sparse Detection Scheme Based on Time Reversal

作　　者：代超蓝 李方伟[1] 王明月[1] DAI Chaolan;LI Fangwei;WANG Mingyue(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Engineering Research Center of Ministry of Education of Mobile Communication,Chongqing Key Laboratory of Mobile Communication Technology,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,移动通信教育部工程研究中心,移动通信技术重庆市重点实验室,重庆400065

出　　处：《信号处理》2021年第11期2171-2177,共7页Journal of Signal Processing

基　　金：国家自然科学基金(61771084):未来宽带无线移动通信系统中基于时间反演的无线传输机制研究。

摘　　要：在复杂多径环境中,为了提升雷达系统对目标信号检测能力,同时减少接收端采样部分空间与时间的使用,提出一种联合时间反演与压缩感知的目标信号检测方案。首先通过时间反演的空时聚焦特性,减少多径效应带来的影响,使目标信号能量聚焦,然后设计一个新的压缩测量矩阵,该压缩矩阵具有一定的降噪特性,且无需重构信号,通过直接处理压缩测量样本进行检测。理论分析和仿真结果表明,本文提出的方案在抗噪声、降低多径环境影响和减轻信号处理压力上具有优势。In the complex multipath environment,in order to improve the detection ability of radar system for target signal and reduce the use of space and time in the sampling part of the receiver,a target signal detection scheme combining time reversal and compressed sensing is proposed.Firstly,the space-time focusing characteristic of time inversion is used to reduce the influence of multipath effect and focus the target signal energy.Then,a new compressed measurement matrix is designed,which has certain noise reduction characteristics and does not need to reconstruct the signal.The compressed measurement samples are directly processed for detection.Theoretical analysis and simulation results show that the proposed scheme has advantages in noise,reducing the impact of multipath environment and reducing the pressure of signal processing.

关 键 词：目标检测 稀疏表示 压缩感知 时间反演 

分 类 号：TN92[电子电信—通信与信息系统]