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Wall compensation in imaging of hidden targets behind multiple walls

机译:多壁背后隐藏目标成像中的壁补偿

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In through-wall-radar imaging (TWRI), this paper presents a fast wall compensation algorithm to deal with the problem of image defocusing and displacement of the target behind multiple parallel and equivalent walls in the case of the known wall parameters including thickness and relative permittivity. Based on the Snell law, we combine these walls into a virtual wall by translating the second wall to the edge of the first wall but keep the focusing delay same. Therefore, instead of searching for multiple refraction points on the surfaces of the multiple actual walls, we just need to find a refraction point on the surface of the virtual wall to calculate the focusing delay rapidly in back-projection imaging. Additionally, the time minimization method is utilized to seek the refraction point. The simulation results demonstrate the image of target behind two walls is focusing and located at the accurate target position using the presented fast compensation algorithm.
机译:在穿墙雷达成像(TWRI)中,本文提出了一种快速的壁补偿算法,以解决在已知壁参数(包括厚度和相对值)的情况下,图像在多个平行且等效壁后的散焦和目标移位的问题。介电常数。根据斯涅尔定律,我们通过将第二个墙平移到第一个墙的边缘,将这些墙组合成虚拟墙,但保持聚焦延迟不变。因此,代替寻找多个实际壁的表面上的多个折射点,我们只需要在虚拟壁的表面上找到一个折射点即可快速计算背投成像中的聚焦延迟。另外,利用时间最小化方法来寻找折射点。仿真结果表明,使用提出的快速补偿算法,两堵墙后面的目标图像聚焦并位于准确的目标位置。

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