Migration Through Resolution Cell Compensation in ISAR Imaging
Migration Through Resolution Cell Compensation in ISAR Imaging
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DOI：
10.1109/lgrs.2004.824766
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发表时间：
2004-04-01
影响因子：
4.8
通讯作者：
Bao, Zheng
中科院分区：
文献类型：
--
作者：
Xing, Mengdao;Wu, Renbiao;Bao, Zheng
距离多普勒（RD）处理在传统逆合成孔径雷达（ISAR）成像中应用广泛。通过包络线对准和自动对焦来补偿运动目标不需要的平移运动。在现有的ISAR成像算法中，由于旋转运动引起的散射体穿过分辨率单元（MTRC）的迁移通常被忽略。随着分辨率的提高或目标尺寸的增大，MTRC不可忽视。本文将SAR中开发的梯形格式算法用于ISAR中的MTRC补偿。在keystone格式化前，需要对原始阶段历史数据进行一致性处理。提出了一种有效的相干处理方法。数值算例验证了该方法的有效性。
Range-Doppler (RD) processing is widely used in conventional inverse synthetic aperture radar (ISAR) imaging. The unwanted translational motion of moving targets is compensated by envelope alignment and autofocus. For existing ISAR imaging algorithms, the scatterers' migration through resolution cells (MTRC) caused by the rotational motion is usually ignored. With the improvement of resolution or the increase of target size, MTRC cannot be neglected. In this letter, the keystone formatting algorithm developed in SAR is used for the MTRC compensation in ISAR. Before the keystone formatting, coherent processing must be performed on the raw phase history data. An effective approach is proposed for this kind of coherent processing. Numerical examples are provided to demonstrate the performance of the proposed approach.