一种穿墙雷达多层墙体参数估计方法  

A Parameter Estimation Method for Multi-Layer Wall of TWR

作　　者：梁步阁[1] 肖骏[1] 杨德贵 LIANG Buge;XIAO Jun;YANG Degui(School of Automation,Central South University,Changsha 410083,China)

机构地区：[1]中南大学自动化学院,长沙410083

出　　处：《重庆科技学院学报（自然科学版）》2022年第5期37-43,共7页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家自然科学基金项目“MIMO穿墙雷达中多层非均匀介质参数的高维耦合机理与成像方法研究”(62171475)。

摘　　要：墙体参数估计一直都是穿墙雷达目标检测与定位中的难点问题。传统方法主要用于检测穿越单层墙体的雷达目标,当用于多层墙体场景时,往往需要将其简化为均匀单层墙体模型再行处理。为此,提出一种穿墙雷达多层墙体参数估计方法。首先,基于SVM对多层墙体进行分类,为后续墙体参数精确估计提供建模依据;其次,构建不同类型墙体回波模型,利用不同天线间隔下介质分界面反射回波的时延特征实现对各层墙体参数的精确估计;最后,通过仿真实验验证此方法的有效性。Wall parameter estimation has always been a difficult issue in the field of TWR target detection and location.The traditional methods mainly consider single-layer wall,and the multi-layer wall scene is often simplified to uniform single-layer wall.Aiming at this problem,a multi-layer wall parameter estimation method of through-wall radar is proposed in this paper.Firstly,the multi-layer wall is classified based on SVM to provide modeling basis for subsequent accurate estimation of wall parameters.Secondly,different types of wall echo models are constructed,and the time-delay characteristics of the reflected echo at the dielectric interface under different antenna spacing are used to accurately estimate the wall parameters of each layer.Finally,the effectiveness of this method is verified by simulation experiments.

关 键 词：穿墙雷达 多层墙体参数估计 时延估计 SVM 墙体分类 

分 类 号：TN957[电子电信—信号与信息处理]