A SAR-GMTI approach based on moving target focusing

被引：0

作者：

Wei B. ^{[1
]}

Zhu D. ^{[1
]}

Wu D. ^{[1
]}

机构：

[1] College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing

来源：

Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2016年 / 38卷 / 07期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Ground Moving Target Indication (GMTI); Synthetic Aperture Radar (SAR); Ultra- High Frequency (UHF) band radar; ω-K algorithm;

D O I：

10.11999/JEIT151036

中图分类号：

学科分类号：

摘要：

Due to the low Signal to Clutter Noise Ratio (SCNR), the residual stationary targets in a clutter suppressed multichannel Ultra-High Frequency (UHF) band Synthetic Aperture Radar (SAR) image may lead to an unacceptable false alarm rate. A method of moving target screening is presented in this paper, which can determine whether the target detected by the Constant False Alarm Rate (CFAR) detector is a real moving one. A moving target data recovery method is described, which can recover the Doppler phase history of any isolated target within a full ω-K SAR image. The recovered data is processed again into a sub-image by range Doppler processing, and the sub-image is refocused with azimuth autofocus processing. The sub-image will not change after refocusing if the target in it is a stationary one, and it will be refocused if the target is a moving one. The false moving target can be eliminated by detecting this change. The proposed method is demonstrated on simulated and real SAR Ground Moving Target Indication (GMTI) data. © 2016, Science Press. All right reserved.

引用

页码：1738 / 1744

页数：6

共 15 条

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