一种超宽带穿墙雷达的三维成像算法研究  

Three-dimensional Imaging Algorithm Applied for the UWB Through-wall Radar Imaging

作　　者：孙佳佳[1] 童创明[1,2] 钟卫军[1] 毛苗[3] 

机构地区：[1]空军工程大学防空反导学院 [2]毫米波国家重点实验室 [3]中国人民解放军94907部队

出　　处：《微波学报》2012年第5期11-16,共6页Journal of Microwaves

摘　　要：提出了一种应用于超宽带穿墙雷达的三维成像算法。在研究后向投影算法原理的基础上,构建了电磁波穿透介质墙的数学模型,补偿了电磁波在墙体中传播的时间延迟,推导了基于偶极子近场辐射模型的穿墙改进后向投影算法,给出了算法的实现流程。利用FDTD得到采样数据,运用算法的具体流程实现对介质墙存在下的目标进行三维成像。验证了算法的有效性,分析了墙体和目标间耦合作用对成像效果的影响。A three-dimensional imaging algorithm applied to the through-wall radar is presented in this paper. A math- ematic model of through-wall electromagnetic wave is constructed. The path of microwave penetrating wall is resolved. The time delay is compensated according to microwave passing through wall. An improved back projection method of through-wall imaging based on the radiation model of dipole is deduced. The algorithm flow Chart is also given. With the sampling data from FDTD, the three-dimensional imaging results are obtained according to the algorithm flow chart. The influence of the wall and the coupling between targets are analyzed. The simulation results show the efficiency of the algorithm.

关 键 词：超宽带雷达 后向投影算法 偶极子 穿墙成像 时域有限差分法 

分 类 号：TN957.52[电子电信—信号与信息处理]