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本文提出了一种对同一雷达波束内距离不能分辨的多个运动目标进行 ISAR 成像的方法。其基本思想是:基于回波信号的时间-频率分析在时间-频率二维分布上通过掩摸的方法进行各目标回波信号的分离,这样把多目标成像转变成了多个单目标的成像,利用单目标运动补偿和成像方法获得各目标的图像。用电磁仿真数据和经过改造的 Steinberg 外场数据进行验证的结果表明,本文提出的多运动目标 ISAR 成像方法是可行的。
This paper presents a method for ISAR imaging of multiple moving targets that can not be resolved within the same radar beam. The basic idea is that the time-frequency analysis based on echo signals separates the target echo signals by masking the two-dimensional distribution of time and frequency, so that the multi-target imaging is transformed into multiple single-target imaging , The use of single-target motion compensation and imaging methods to obtain the image of each target. The results of electromagnetic simulation data and modified Steinberg field data show that the multi-motion target ISAR imaging method proposed in this paper is feasible.