星载多通道高分辨率宽测绘带SAR系统运动目标检测方法
doi: 10.3724/SP.J.1146.2013.00465
Ground Moving Target Indication for Spaceborne Multi-channel High Resolution Wide Swath SAR System
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摘要: 该文针对星载多通道高分辨率宽测绘带合成孔径雷达系统，提出一种新的运动目标检测方法。该方法首先利用波束形成方法进行杂波抑制，然后对运动目标的斜距历程进行拟合得到运动目标的运动方向。接着对杂波抑制后的数据进行聚焦处理，得到模糊的运动目标图像，并利用恒虚警检测技术检测得到所有的模糊运动目标。最后根据模糊图像的空间关系和估计出的运动方向检测出真实目标。星载仿真数据验证了该方法的有效性。
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关键词:
- 合成孔径雷达 /
- 运动目标检测(GMTI) /
- 高分辨率宽测绘带(HRWS) /
- 多普勒模糊
Abstract: A method of Ground Moving Target Indication (GMTI) for spaceborne multi-channel High Resolution Wide Swath (HRWS) Synthetic Aperture Radar (SAR) system is presented. Firstly, the method utilizes beamforming for clutter suppression, then estimates moving target direction by fitting for the slant range of the moving target. Secondly, focusing for the clutter suppressed data is performed to obtain ambiguous images of the moving target, then all ambiguous moving targets are obtained by Constant False Alarm Rate (CFAR) detection technology. Finally, this method detects real targets according to the spatial relationships of fuzzy images and motion direction estimated. The spaceborne HRWS simulation data verifies the validity of the proposed method. -
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