中文摘要：

针对频率步进雷达同一波束内多个运动目标在径向上重叠而无法分辨时的ISAR成像问题,提出了一种基于调频傅里叶变换的ISAR多目标成像新方法。在构建频率步进雷达多目标回波信号模型的基础上,采用调频傅里叶变换精确估计各个目标的速度参数,结合Clean方法实现对多目标回波信号的分离,完成多目标ISAR成像。仿真实验结果进一步验证了文章所采用方法的有效性。

英文摘要：

Aiming at the stepped frequency ISAR imaging problems of multiple moving targets in the same antenna beam overlapped over the range,a new method of stepped frequency ISAR imaging of multiple targets is proposed,based on the chirp-Fourier transform（CFT）.On the basis of the multi-target echoes model of stepped frequency radar,the velocities of each target can be estimated accurately by the CFT.Then the multiple target echo signals can be separated by combining CFT and clean idea,thus the ISAR imaging is finished.The simulation results also prove the validity of the proposed method.