Cross-Range Scaling for ISAR Based on Image Rotation Correlation
Cross-Range Scaling for ISAR Based on Image Rotation Correlation
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DOI：
10.1109/lgrs.2009.2021990
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发表时间：
2009-06
影响因子：
4.8
通讯作者：
C. Yeh;Jia Xu;Yingning Peng;Xiutan Wang
中科院分区：
文献类型：
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作者：
C. Yeh;Jia Xu;Yingning Peng;Xiutan Wang
为了更好地理解逆合成孔径雷达（ISAR）的成像效果，更需要从传统的距离-多普勒域到均匀的距离-跨距离域来描述。为了完成横向定标过程，首先需要估计目标的旋转速度。针对平面均匀旋转目标，本文提出了一种基于旋转相关概念的新方法，该方法既不需要突出散射中心，也不需要提取相位系数。在此基础上，提出了一种基于快速傅立叶变换的三步卷积插值算法，实现了上述相关，提高了算法的实现效率。最后，仿真和真实的ISAR数据的实验结果证明了该方法对不同目标的有效性。
For better understanding of the imaging result provided by inverse synthetic aperture radar (ISAR), it is more desirable to present it from the conventional range-Doppler domain to the homogeneous range-cross-range domain. To accomplish the process of cross-range scaling, the rotating velocity (RV) of the target should be estimated first. For a uniformly planar rotating object, a novel method based on a concept of rotation correlation is proposed to obtain the RV in this letter, and neither prominent scattering centers nor phase coefficient extraction is required. Furthermore, a three-step fast-Fourier-transform-based convolution interpolation scheme is proposed to realize the above correlation, which makes the proposed method more efficient for implementation. Finally, experimental results with both simulated and real ISAR data are provided to demonstrate the effectiveness of the proposed method for different targets.