雷达穿墙检测是一种新颖的人体探测技术，文中构建了电磁波穿透绝缘介质墙的数学模型，推导了步进频信号穿墙后向投影算法，给出了算法实现流程，并对介质墙存在时的非聚焦及聚焦成像结果进行了仿真，验证了算法的有效性。

Radar through wall detecting is a kind of new technology of exploring life. In this paper, the mathematic model of through-wall electromagnetic wave is constructed. The back projection method of through - wall stepped frequency signal is deduced. The arithmetic realization flow is also in the paper. In the end, we simulate the imaging result, including both defocused and focused circumstance. The simulation result proves the efficiency of the arithmetic.

TN957.52