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中文摘要：
针对步进频雷达系统,分析了目标匀加速运动对回波相位的调制效应,提出基于波形预先设计和相位对消技术组合的ISAR成像方法,该方法通过对脉冲重复时间的设计消除目标速度带来的相位高次项,并通过相位对消技术消除由目标加速度带来的相位高次项.因此对于匀加速运动的目标,算法不需要估计速度和加速度,减少了计算量.仿真试验演示了算法的性能,证明了算法的有效性.
英文摘要：
In the stepped-frequency radar system,motion introduces additive high order phase terms,which results in distortion of range profile.The phase modulation effect is analyzed and a novel ISAR imaging method is proposed for uniformly accelerative target,which based on predesigned waveform and phase cancellation.The pulse repetition time is predesigned to eliminate the high order phase terms introduced by velocity of the target.Then the high order phase terms introduced by acceleration are removed by phase cancellation.For a uniformly accelerative target,the velocity and acceleration are not need to estimate in the proposed method,so the computation burden is greatly reduced.Simulations with synthetic data demonstrate the performance of the new method.The results confirm its effectiveness.
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