中文摘要：

相位校正严重影响了逆合成孔径雷达（ISAR）图像的聚焦和成像质量，其中多普勒质心跟踪（DCT）法因具备明确的算法原理和适中的计算量，成为一种广泛应用的相位校正方法。但是，当目标存在强散射点时，DCF法的效果往往不佳，在分析和比较现有方法的基础上，本文提出采用图像域均衡处理来改进DCT法，新方法通过简单的均衡和反馈环节，能够显著降低强散射点的影响，并提高DCT法的稳健性和成像质量，最后，和多类目标实测数据的成像结果证明了新方法的有效性。

英文摘要：

Phase correction may seriously affect the ultimate focusing and imaging quality of inverse synthetic aperture radar （ISAR）. Due to the explicit algorithm principle and moderate computation amount, Doppler centroid tracking（DCT） method is a well-used phase correction method of ISAR. However, the performance of DCT is normally unsatisfactory when the target has strong scatterers.Based on the analysis and comparison of existing methods, the image-domain balancing is proposed to modify DCT method in this paper.By using the simple operators of balancing and feedback,the proposed method may dramatically reduce the ef- fect of strong scatterers and improve the robustness and the ultimate imaging quality. Finally, the performance analysis and imaging results of several kinds of real target are also provided to demonstrate the effectiveness of the proposed method.