High Resolution ISAR Imaging of Targets with Rotating Parts
High Resolution ISAR Imaging of Targets with Rotating Parts
复制标题
对带有旋转部件的目标进行高分辨率 ISAR 成像
DOI：
10.1109/taes.2011.6034649
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发表时间：
2011-10-01
影响因子：
4.4
通讯作者：
Bao, Zheng
中科院分区：
文献类型：
--
作者：
Bai, Xueru;Zhou, Feng;Bao, Zheng
对于具有旋转部件的目标，其主体的ISAR图像可能被微多普勒信号遮蔽，传统上将其视为干扰并从雷达回波中去除。然而，使用微多普勒信号执行成像是潜在有用的，因为它们包含关于旋转部件的几何结构的信息。受Radon逆变换的启发，本文建立了旋转部件二维ISAR成像的数据记录模型。在此基础上，将实值逆Radon变换应用于距离慢时域成像。在此基础上，提出了一种利用雷达回波的正弦模和相位信息的复值逆Radon变换方法。此外，我们分析了在真实的世界的情况下，这些算法应用时可能出现的问题，并提供相应的解决方案。最后，使用仿真和实测数据证明了算法的有效性。
For a target with rotating parts, the ISAR image of its main body may be overshadowed by micro-Doppler signals, which are traditionally treated as interference and removed from radar echoes. However, it is potentially useful to perform imaging using micro-Doppler signals because they contain information on the geometrical structure of the rotating part. Inspired by the inverse Radon transform, well-known in the image processing community, this paper creates a data-recording model for two-dimensional (2D) ISAR imaging of rotating parts. Based on this model, the real-valued inverse Radon transform is applied to image formation in the range-slow time domain. Then we put forward a complex-valued inverse Radon transform for imaging of rotating parts, which utilizes both the sinusoidal modulus and the phase of the radar echoes. Additionally, we analyze possible problems when applying these algorithms in real world situations and provide corresponding solutions. Finally, the effectiveness of the algorithms is demonstrated using simulated and measured data.