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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Imaging and Parameter Estimation of Fast-Moving Targets With Single-Antenna SAR
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Imaging and Parameter Estimation of Fast-Moving Targets With Single-Antenna SAR

机译：单天线SAR快速移动目标的成像与参数估计

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摘要

This letter proposes a novel algorithm for focusing moving targets with fast cross-track velocities and estimating their motion parameters with single-antenna synthetic aperture radar. The spectrum of a fast-moving target contains the Doppler ambiguity and the third-order phase error. Hough transform is utilized to estimate the slope of the range walk trajectory, from which the cross-track velocity is obtained and the Doppler ambiguity problem is solved. Then, polynomial Fourier transform is adopted to estimate the second- and third-order Doppler parameters of the moving target. By estimating and compensating for the third-order phase error, the imaging resolution of the fast-moving target is improved and the motion parameters, including the cross-track acceleration, are correctly estimated. Both simulated and real data processing results are provided to demonstrate the effectiveness of the proposed algorithm.
机译：这封信提出了一种新颖的算法，用于以快速跨轨速度聚焦运动目标并使用单天线合成孔径雷达估计其运动参数。快速移动目标的频谱包含多普勒模糊度和三阶相位误差。利用霍夫变换估计距离行走轨迹的斜率，从而获得跨轨速度并解决了多普勒模糊性问题。然后，采用多项式傅里叶变换估计运动目标的二阶和三阶多普勒参数。通过估计和补偿三阶相位误差，可以提高快速移动目标的成像分辨率，并正确估计包括跨轨加速度在内的运动参数。提供了模拟和真实数据处理结果，以证明所提出算法的有效性。

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