CAJ | 학술논문

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IS A R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IS A R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。
침대빈솔보진뢰체동일파속내다개운동목표재경향상중첩이무법분변시적IS A R성상문제，제출료일충기우조빈부리협변환적ISAR다목표성상신방법。재구건빈솔보진뢰체다목표회파신호모형적기출상，채용조빈부리협변환정학고계각개목표적속도삼수，결합Clean방법실현대다목표회파신호적분리，완성다목표IS A R성상。방진실험결과진일보험증료문장소채용방법적유효성。
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 mul‐tiple 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 .