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编队目标由于各目标回波在距离域和多普勒域都有重叠,难以直接利用单目标的成像方法对多目标进行成像。本文提出先对多目标进行统一的距离走动校正,然后采用广义二阶keystone变换校正距离弯曲,最后采用基于调幅-线性调频信号模型的参数估计方法得到多目标的距离-瞬时多普勒图像。仿真数据的处理表明了所提方法的有效性。
Formation targets Because each target echo overlaps both the range and Doppler domains, it is difficult to directly image a multi-target using a single-target imaging method. In this paper, we first propose a unified distance walk correction for multi-targets firstly, and then use generalized second-order keystone transform to correct the distance bending. Finally, a multi-target distance-instantaneous Doppler image is obtained by using the parameter estimation method based on AM-LFM model. The simulation data processing shows the effectiveness of the proposed method.