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Sensors 2016, 16(6), 873; doi:10.3390/s16060873

GMTI for Squint Looking XTI-SAR with Rotatable Forward-Looking Array

School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China
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Author to whom correspondence should be addressed.
Academic Editor: Assefa M. Melesse
Received: 20 March 2016 / Revised: 29 May 2016 / Accepted: 7 June 2016 / Published: 14 June 2016
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Abstract

To realize ground moving target indication (GMTI) for a forward-looking array, we propose a novel synthetic aperture radar (SAR) system, called rotatable cross-track interferometry SAR (Ro-XTI-SAR), for squint-looking application in this paper. By changing the angle of the cross-track baseline, the interferometry phase component of squint-looking Ro-XTI-SAR caused by the terrain height can be approximately adjusted to zero, and then the interferometry phase of Ro-XTI-SAR is only sensitive to targets’ motion and can be equivalent to the along track interferometry SAR (ATI-SAR). Furthermore, the conventional displaced phase center array (DPCA) method and constant false alarm (CFAR) processing can be used to accomplish the successive clutter suppression, moving targets detection and relocation. Furthermore, the clutter suppressing performance is discussed with respect to different system parameters. Finally, some results of numerical experiments are provided to demonstrate the effectiveness of the proposed system. View Full-Text
Keywords: synthetic aperture radar (SAR); ground moving target indication (GMTI); squint looking; cross-track interferometry (XTI); along-track interferometry (ATI); parameter estimation; displaced phase center array (DPCA) synthetic aperture radar (SAR); ground moving target indication (GMTI); squint looking; cross-track interferometry (XTI); along-track interferometry (ATI); parameter estimation; displaced phase center array (DPCA)
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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

Jing, K.; Xu, J.; Huang, Z.; Yao, D.; Long, T. GMTI for Squint Looking XTI-SAR with Rotatable Forward-Looking Array. Sensors 2016, 16, 873.

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