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Wall compensation in imaging of hidden targets behind multiple walls

机译:多墙后面隐藏目标成像的墙壁补偿

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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:在通壁雷达成像(TWRI)中,本文介绍了在包括厚度和相对的已知壁参数的情况下处理多个平行和等效壁后面的目标的图像散焦和位移的图像散焦和位移问题的快速壁补偿算法。介质。基于斯内尔法律,我们将这些墙壁与第一壁的边缘转换到第一壁的边缘,但保持聚焦延迟相同。因此,代替在多个实际壁的表面上搜索多个折射点,我们只需要在虚拟壁的表面上找到折射点,以便在后投影成像中快速地计算聚焦延迟。另外,利用时间最小化方法来寻求折射点。仿真结果展示了两个壁背后的目标的图像,使用所示的快速补偿算法在精确的目标位置上聚焦并位于精确的目标位置。

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