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电子学报  2013 

机载雷达高速空中机动目标检测新方法

DOI: 10.3969/j.issn.0372-2112.2013.01.016, PP. 86-90

Keywords: 机载雷达,空时自适应处理,动目标检测,Keystone变换,Wigner-Hough变换

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Abstract:

空时自适应处理(Space-TimeAdaptiveProcessing,STAP)是一种有效的机载雷达运动目标检测方法.空中目标的高速运动会导致其回波产生严重的距离走动和多普勒模糊,并且目标作加速运动时还会引起多普勒走动.为了有效检测上述目标,本文提出了一种新方法,该方法在目标距离走动校正之前首先进行杂波抑制,避免了直接利用Keystone变换校正存在多普勒模糊的运动目标距离走动时影响杂波分布特性、进而降低STAP性能的问题;然后对距离走动校正后的数据进行Wigner-Hough变换,估计出目标的加速度,并根据估计值对多普勒走动项进行补偿,从而使目标能量能够得到有效积累;最后进行运动目标检测.仿真结果证明了该方法的有效性.

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