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基于联合调频傅里叶变换的步进频雷达目标运动的补偿

DOI: 10.15918/j.tbit1001-0645.2015.06.016

Keywords: 频率步进 调频傅里叶变换 速度估计 ISAR

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Abstract:

针对频率步进雷达目标成像过程中运动参数精确估计及补偿问题,提出了基于脉间和脉内联合调频傅里叶变换的参数估计方法. 目标回波信号与本振信号混频后看作线性调频信号,将其作调频傅里叶变换,并在脉组间进行相干累积. 通过对调频率的搜索得到目标速度的精确估计,从而实现了低信噪比下目标运动的补偿. 由于该方法在调频傅里叶变换过程中,频率维采用了IFFT操作,运算效率较高. 计算机仿真结果进一步表明了该方法的有效性和实用性

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