逆合成孔径雷达的成像研究
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摘要
逆合成孔径雷达成像技术是近半个世纪以来发展起来的一项在军事和民用方面都具有重要实用价值的高新技术。其中平动补偿是关键技术,平动补偿包括包络对齐和相位补偿两步,本文总结了常用的包络对齐和相位补偿算法,重点研究了基于图像准则的相位补偿技术,并在实测数据的仿真中证明了该方法的优越性。
     为了提高成像质量,本文接着讨论了目标做匀加速转动时的成像和转动补偿,在转动补偿中重点研究了当目标匀速直线运动时相对转角非均匀变化的补偿这种典型情况,并进行了仿真,取得了良好的效果。
Inverse Synthetic Aperture Radar (ISAR) imaging is an important breakthrough in the field of modern radar technique, it is very practicable to not only military but also civilian use. The translational motion compensation is a key technique in inverse synthetic aperture radar imaging, The translational motion compensation includes two steps which are range alignment and phase compensation. This dissertation summarizes some general range alignment and phase compensation ways and researches the motion compensation based on image cost function, moreover experimental data and simulation are sued to prove this method.
    In order to improve image, this dissertation discusses the imaging when the target does a constant acceleratively rotating and study rational compensation when target moves uniformly rectilinearly. These methods are proved availably through experimental data and simulation, the quality of the image of the experimental and simulation data is evidently improved through rotational compensation.
引文
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