MIMO雷达中基于时间反演的移动目标检测方案  

Moving Target Detection Scheme Based on Time Reversal in MIMO Radar

作　　者：李方伟[1] 代超蓝 王明月[1] LI Fangwei;DAI Chaolan;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4期588-595,共8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：在多输入多输出(Multiple input multiple output,MIMO)雷达中,针对运动目标所产生的信号变化易受多径效应和杂波环境的影响,导致运动目标检测性能不理想的问题,提出了一种基于时间反演(Time Reversal,TR)的优化方案。首先,利用时间反演的空时聚焦性,减少多径效应对目标信号的影响,同时使运动目标产生的信号能量聚焦,不易淹没在杂波环境中;其次,通过奈曼皮尔逊准则设计检测算法并计算出检测概率的近似计算公式;最后仿真结果表明:在杂波环境具有相同信噪比情况下,所提方案比传统MIMO的检测方法有较好的性能提升。In the multiple input multiple output(MIMO) radar, aiming at the problem that the signal changes caused by moving targets are easily affected by multipath effect and clutter environment, an optimization scheme based on time reversal is proposed. Firstly, the space-time focusing property of time reversal is used to reduce the influence of multipath effect on the target signal, and the signal energy generated by the moving target is focused, which is not easy to be submerged in the clutter environment;secondly, the detection algorithm is designed by the Neyman Pearson criterion and the approximate calculation formula of detection probability is calculated;finally, the simulation results show that the signal-to-noise ratio is the same in the clutter environment the proposed scheme has better performance than the traditional MIMO detection methods.

关 键 词：目标检测 多输入多输出 多径环境 时间反演 

分 类 号：TN92[电子电信—通信与信息系统]