穿墙雷达由于其工作环境的复杂性，导致接收的目标信号十分微弱，即使通过背景对消抑制了天线耦合波、墙体直达波等强杂波，目标信号也难以突显，同时传统的检测方法并不能解决目标与墙体等环境响应产生“鬼影”目标的问题。为解决这一问题，建立了点目标、扩展目标以及运动目标等模型对虚假“鬼影”目标的产生原因进行分析，并提出了一种基于幅度和空间位置等特征相结合的图像检测方法。仿真和实验结果证明了“鬼影”的理论分析和方法的有效性。%The work environment of the through⁃the⁃wall radar is complicated,which makes the received target signal com⁃pletely weak. Even though the antenna coupling wave,the wall direct wave and other strong clutter waves have been restrained by background compensation,the target signal is hard to appear. Traditional detection methods can′t eliminate the“ghost”tar⁃get generated by the environmental response. To settle this problem,models of point target,extended target and moving target were established to analyze the generation reasons of false“ghost”target. A new image detection method based on the combina⁃tion of amplitude and spatial location features is proposed for the through⁃the⁃wall radar. The validity of“ghost”theoretical analy⁃sis and this method was verified by simulation and experiments.
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