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Sensors 2016, 16(3), 383; doi:10.3390/s16030383

Road-Aided Ground Slowly Moving Target 2D Motion Estimation for Single-Channel Synthetic Aperture Radar

1
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
2
School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China
3
Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA
4
Insititute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Assefa M. Melesse
Received: 31 January 2016 / Revised: 9 March 2016 / Accepted: 11 March 2016 / Published: 16 March 2016
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [1951 KB, uploaded 16 March 2016]   |  

Abstract

To detect and estimate ground slowly moving targets in airborne single-channel synthetic aperture radar (SAR), a road-aided ground moving target indication (GMTI) algorithm is proposed in this paper. First, the road area is extracted from a focused SAR image based on radar vision. Second, after stationary clutter suppression in the range-Doppler domain, a moving target is detected and located in the image domain via the watershed method. The target’s position on the road as well as its radial velocity can be determined according to the target’s offset distance and traffic rules. Furthermore, the target’s azimuth velocity is estimated based on the road slope obtained via polynomial fitting. Compared with the traditional algorithms, the proposed method can effectively cope with slowly moving targets partly submerged in a stationary clutter spectrum. In addition, the proposed method can be easily extended to a multi-channel system to further improve the performance of clutter suppression and motion estimation. Finally, the results of numerical experiments are provided to demonstrate the effectiveness of the proposed algorithm. View Full-Text
Keywords: synthetic aperture radar (SAR); ground moving target indication (GMTI); radar vision; parameter estimation; road extraction synthetic aperture radar (SAR); ground moving target indication (GMTI); radar vision; parameter estimation; road extraction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, Z.; Xu, J.; Huang, Z.; Zhang, X.; Xia, X.-G.; Long, T.; Bao, Q. Road-Aided Ground Slowly Moving Target 2D Motion Estimation for Single-Channel Synthetic Aperture Radar. Sensors 2016, 16, 383.

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