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.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第3期545-548,共4页
Systems Engineering and Electronics
关键词
穿墙检测
步进频率
后向投影
聚焦
through-wall detecting
stepped frequency
back projection
focus
