在逆合成孔径雷达成像中，距离多普勒算法以其效率高占据了重要的地位。但基本 R - D 算法要求成像目标转角小，而且存在目标图像横向分辨率低等不足。本文在研究 ISAR 成像转台模型的基础上，采用脉冲压缩技术、插值技术、极坐标格式、后阈值处理技术以及加权技术改进 R - D 成像算法。同时对大转角情况下的目标进行成像。算法对二维目标由110个散射点组成的飞机模型进行仿真。仿真结果表明算法的有效性。%In inverse synthetic aperture radar imaging, R - D has an important position in the imaging algorithm because of its high efficiency. But basic R - D algorithm requires the imaging target which have small rotate angle,and the existence of target image with low range resolution. In this paper,on the basic of the study of ISAR imaging model of turntable ,apply pulse compression,interpolation technology, polar format, threshold processing technology and windowing to improved R - D imaging algorithm. At the same time,imaging the target in the large rotate angle. Algorithm is applied to imaging a two - dimensional plane model which composed of 110 scattered dots. This paper presents the simulation results. Simulation results show that the algorithm is effective.
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