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首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >Ground Moving Target Indication via Multichannel Airborne SAR
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Ground Moving Target Indication via Multichannel Airborne SAR

机译:通过多通道机载SAR进行地面移动目标指示

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摘要

We consider moving target detection and velocity estimation for multichannel synthetic-aperture-radar (SAR)-based ground moving target indication (GMTI). Via forming velocity versus cross-range images, we show that small moving targets can be detected even in the presence of strong stationary ground clutter. Furthermore, the velocities of the moving targets can be estimated, and the misplaced moving targets can be placed back to their original locations based on the estimated velocities. An iterative adaptive approach, which is robust and user parameter free, is used to form velocity versus cross-range images for each range bin of interest. Moreover, we discuss calibration techniques to estimate the relative antenna distances and antenna gains in practical systems. Furthermore, we present a simple algorithm for stationary clutter cancelation. We conclude by demonstrating the effectiveness of our approaches by using the Air Force Research Laboratory publicly released Gotcha airborne SAR-based GMTI data set.
机译:我们考虑基于多通道合成孔径雷达(SAR)的地面运动目标指示(GMTI)的运动目标检测和速度估计。通过形成速度与跨范围图像,我们表明即使在强烈的静止地面杂波存在下也可以检测到较小的移动目标。此外,可以估计移动目标的速度,并且可以基于估计的速度将放错位置的移动目标放回其原始位置。鲁棒且无用户参数的迭代自适应方法用于为每个目标范围仓形成速度与跨范围图像。此外,我们讨论了校准技术,以估算实际系统中的相对天线距离和天线增益。此外,我们提出了一种用于平稳杂波消除的简单算法。最后,我们通过使用空军研究实验室公开发布的基于Gotcha机载SAR的GMTI数据集来证明我们的方法的有效性。

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