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航空学报  2013 

基于Keystone变换和MDCFT的高机动弱目标检测与参数估计

DOI: 10.7527/S1000-6893.2013.0146, PP. 855-863

Keywords: 长时间相参积累,目标检测,参数估计,Keystone变换,修正离散Chirp-Fourier变换

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Abstract:

常规雷达对隐身、超声速和高机动目标存在回波信噪比不足、距离徙动和多普勒谱扩展问题。将Keystone变换和修正离散Chirp-Fourier变换(MDCFT)相结合,提出了一种新的雷达信号处理算法。该算法通过Keystone变换补偿距离徙动问题,利用MDCFT对多普勒谱严重扩展的目标回波进行相参积累,提高目标检测性能的同时完成了对目标参数的估计,且该算法在方位向欠采样时仍可适用。最后对算法运算量及性能进行了分析,通过仿真验证了该算法的有效性。

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