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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >Uniform Rotational Motion Compensation for ISAR Based on Phase Cancellation
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Uniform Rotational Motion Compensation for ISAR Based on Phase Cancellation

机译：基于相位抵消的ISAR均匀旋转运动补偿

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摘要

Targets with uniform rotational motion may cause migration through cross-range cells during the imaging time, which makes the inverse synthetic aperture radar image smeared. Traditional motion compensation methods hardly work well because it is difficult to estimate the quadratic phase error (QPE) caused by uniform rotational motion efficiently. To solve this problem, a novel QPE estimation method based on phase cancellation (PC) is proposed in this letter. In this method, PC is used to eliminate the linear term of the phase, which is a disadvantage to the QPE estimation. By employing the weighted linear least squares algorithm, the QPE can be estimated efficiently and robustly. Experiments with both simulated and measured radar data demonstrate the performance of the proposed method.
机译：具有均匀旋转运动的目标可能会在成像期间通过跨范围的单元迁移，从而使合成孔径反演雷达图像模糊不清。传统的运动补偿方法很难奏效，因为很难有效地估计由均匀旋转运动引起的二次相位误差（QPE）。为了解决这个问题，本文提出了一种新的基于相位抵消（PC）的QPE估计方法。在这种方法中，PC用于消除相位的线性项，这对QPE估计不利。通过采用加权线性最小二乘算法，可以有效，可靠地估算QPE。通过模拟和实测雷达数据进行的实验证明了该方法的性能。

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