穿墙雷达室内多径机理分析与抑制方法  

Through-the-Wall Radar Indoor Multipath Mechanism Analysis and Mitigation Strategies

作　　者：申文婷[1] 晋良念[1] 刘琦[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《雷达科学与技术》2016年第6期605-613,共9页Radar Science and Technology

基　　金：国家自然科学基金(No.61461012);广西区自然科学基金(No.2013GXNSFAA019329);认知无线电与信息处理教育部重点实验室2015主任基金项目(No.CRKL150107);国家级大学生创新计划项目(No.201510595007);桂林电子科技大学研究生教育创新计划资助项目(No.YJCXS201513)

摘　　要：由于穿墙雷达室内多径效应的存在,使得回波信号功率减弱,甚至淹没于多径虚假像中,造成目标数量和位置的误判。针对室内多径效应问题,首先构建目标之间以及目标和墙体之间的多径传播模型,然后利用双圆解析表达式方法得到多径虚假像的位置与目标位置、子孔径位置、子孔径大小之间的关联性,并用此来分析室内多径虚假像产生机理,最后通过子孔径双层融合方法抑制多径虚假像。仿真和实验结果表明,该方法可以有效抑制多径虚假像,从而验证了理论分析的可行性。In the indoor environment, the echo signal will be weakened and overwhelmed by ghosts signal due to the influence of multipath effects, which leads to misjudgment of the real position, and quantity of targets. In order to deal with the multipath effects, at first, the mechanism of ghosts should be analyzed via two specific multipath propagation models. The one is among the targets and the other is between the targets and wall. Secondly, the relevance of the real targets, positions of subarray, length of subarray and positions of ghosts will be obtained by use of the double circular analytical expression method. And the relevance is used to analyze the indoor multipath mechanism of ghosts. Finally, the multipath ghosts will be restrained via subarray double fusion method. The simulation and experimental results show that the multipath ghosts are restrained effectively, which validates the proposed algorithm.

关 键 词：超宽带穿墙成像 室内多径传播模型 多径虚假像 子孔径双层融合方法 

分 类 号：TN957.51[电子电信—信号与信息处理]