一种雷达穿墙成像算法  

Arithmetic of radar through-wall imaging

作　　者：李述为[1,2,3] 晏磊[1] 杨绍文 高梅国[3] 傅雄军[3] 孙华波[1] 

机构地区：[1]北京大学遥感与地理信息系统研究所,北京100871 [2]贵州航空工业集团有限责任公司,贵州贵阳550009 [3]北京理工大学电子工程系,北京100081

出　　处：《系统工程与电子技术》2009年第3期545-548,共4页Systems Engineering and Electronics

摘　　要：构建了电磁波穿透绝缘介质墙的数学模型,解决了电磁波穿透墙壁过程中折射路径的问题,补偿了电磁波在墙体中传播产生的额外时间延迟,推导了步进频率信号穿墙后向投影算法,给出了算法实现流程。运用算法具体流程对介质墙存在时的非聚焦及聚焦成像结果进行了仿真。分析了墙壁厚度及介电常数变化时对成像结果的影响,验证了算法的有效性。A mathematic model of through-wall electromagnetic wave is constructed. The path of microwave penetrating wall is resolved. The extra time delay is compensated according to microwave passing through wall. The back projection method of through-wall stepped frequency signals is deduced. The arithmetic realization flow is also given. The imaging result is simulated according to the arithmetic flow, including both defo cused and focused circumstance, and the influence of the thickness and dielectric constant of the wall is analyzed. The simulation result proves the efficiency of the arithmetic.

关 键 词：穿墙检测 步进频率 后向投影 聚焦 

分 类 号：TN958[电子电信—信号与信息处理]