一种弹道导弹多目标时频分析ISAR成像算法及仿真

在研究多目标ISAR成像回波信号的基础上,提出了一种基于谱图重排的时频分析ISAR成像算法,针对同一距离单元内不同径向速度和不同微动状态两种情况的弹道导弹多目标ISAR成像问题进行了新算法的仿真研究。仿真结果表明,这种成像方法具有优良的时频聚焦性能,证明了该方法的有效性。

A Time-Frequency Analysis Method and Simulation of ISAR Imaging for Ballistic Missile Multi-Targets

Based on the study of echo signal model for multi-targets,a time-frequency method based on spectrum reassignment was proposed for missile multi-targets ISAR imaging. Two aspects of ISAR imaging for multi-targets were simulated in different speed and in different micro-motion in the same range cell,and the spectrum reassignment time-frequency method for multi-targets ISAR imaging was simulated. The imaging results obtained by using simulated data show the time-frequency focus performance and the effectiveness of the proposed method.