基于因子分析法和图像对比度的穿墙雷达杂波抑制
doi: 10.3724/SP.J.1146.2013.00063
The Clutter Suppression Based on Factor Analysis and Image Contrast in Through-the-wall Application
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摘要: 在穿墙成像中，墙体反射波、天线耦合波等杂波常常将目标信号淹没，严重影响了目标的探测、定位等后续处理。为解决这一问题，该文采用因子分析法抑制杂波，并提出一种新的准则图像对比度，作为因子选择的衡量标准。为验证了这一方法的有效性，该文设计了暗室穿墙实验，分别对木板墙和混凝土墙后目标进行探测，并采用所提出的方法对得到的回波数据进行处理，实验结果表明，该方法能够在目标信息未知的条件下，得到最优的杂波抑制结果。Abstract: In Through-the Wall Imaging (TWI), the clutter, because of its great energy, has great effect on the detection of the targets. For the purpose of clutter suppression, Factor Analysis (FA) method is applied to TWI data. Besides, a new evaluation criterion, image contrast, for selecting the proper factors is introduced. To validate the method experimentally, a set of through-the-wall experiments in an anechoic chamber are designed. The experimental results indicate that the technique based on FA and image contrast can efficiently suppress the clutter without a priori knowledge about targets.
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