穿墙雷达平面多层媒质二维衍射层析成像算法

Two-Dimensional Diffraction Tomography Through-the-Wall Radar Imaging Algorithm for Planar Multilayered Media

为了解决多层介质墙体后隐蔽目标探测的问题,提出了一种穿墙雷达平面多层媒质二维衍射层析成像算法。所提成像算法基于一阶Born近似理论,通过平面多层媒质的格林函数谱域展开式和快速傅里叶变换技术,实现对多层墙体后隐蔽目标的快速准确成像重建。基于时域有限差分法产生的仿真数据处理结果验证了此成像算法的有效性和准确性。

In order to solve the problem of detection of targets behind the muhilayered wall, a novel diffraction tomo- graphy （DT） imaging algorithm for through-the-wall radar （TWR） system is proposed in this paper. Based on the first-order Born approximation theory, the proposed DT imaging algorithm exploits the spectral form of planar muhilayered medium and fast Fourier transform technique to implement the fast and accurate imaging reconstruction of the target concealed behind the muhilayered wall. The effectiveness and validity of the proposed imaging algorithm have been verified by processing the syn- thetic data generated by the finite difference time domain （FDTD） method.