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A FAST ALONG-TRACK VELOCITY ESTIMATION METHOD FOR MOVING TARGETS IN MONOSTATIC SAR IMAGE

机译:一种快速沿着单像SAR图像移动目标的速度速率估计方法

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Spaceborne Synthetic Aperture Radar (SAR) has attracted special interests in ocean applications, but the fast estimation of ship velocity remains a big problem. A fast along-track velocity estimation method for moving targets is proposed in this manuscript. In our method, several defocusing filters are applied to the imaging result firstly. Exploiting the differences of the maximum of the filtered images, the along-track velocity of all moving targets can be estimated. Subsequently, instead of iterative estimation, a Look-Up-Table (LUT) technique is used to accelerate the estimation to satisfy the real-time processing demand. Finally, proposed method has been shown effective on both simulated and real TerraSAR-X dataset, demonstrating capabilities of accurately estimating along-track velocity.
机译:星载合成孔径雷达(SAR)吸引了海洋应用的特殊兴趣,但船速的快速估计仍然是一个大问题。在该稿件中提出了一种用于移动目标的快速沿轨道速度估计方法。在我们的方法中,首先将若干散焦过滤器应用于成像结果。利用滤波图像的最大差异,可以估计所有移动目标的轨道速度。随后,代替迭代估计,用于加速估计以满足实时处理需求的估计来加速估计。最后,已经在模拟和真实的Terrasar-X数据集上显示了所提出的方法,证明了沿轨道速度准确估计的能力。

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