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Sensors 2017, 17(6), 1270; doi:10.3390/s17061270

Investigation of Azimuth Multichannel Reconstruction for Moving Targets in High Resolution Wide Swath SAR

1
College of Information Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
2
Inner Mongolia Key Laboratory of Radar Technology and Application, Hohhot 010051, China
3
Department of Spaceborne Microwave Remote Sensing, Institute of Electronics, Chinese Academy of Sciences (IECAS), Beijing 100190, China
4
Electronics & Information Engineering, Beihang University, Beijing 100191, China
5
China Electronics Technology Group Corporation, Information Science Academy, Beijing 100098, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 21 March 2017 / Revised: 20 May 2017 / Accepted: 26 May 2017 / Published: 2 June 2017
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [3811 KB, uploaded 2 June 2017]   |  

Abstract

The azimuth multichannel imaging scheme with the large receive antenna divided into multiple sub-apertures usually leads to azimuth non-uniform sampling, and echoes from all azimuth channels should be reconstructed based on the signal model before conventional SAR imaging. Unfortunately, the multichannel signal model of a moving target is different from that of a fixed target. This paper analyzes the multichannel signal model of the moving target and the effect of the target velocity on azimuth multichannel reconstruction. Based on the multichannel signal mode of the moving target, a new multichannel signal reconstruction algorithm is proposed. Furthermore, the slant range velocity is estimated by computing signal energy distribution. Simulation results on point targets validate the proposed approach. View Full-Text
Keywords: high resolution wide swath (HRWS); azimuth multichannel reconstruction; moving target imaging; target velocity estimation; synthetic aperture radar (SAR) high resolution wide swath (HRWS); azimuth multichannel reconstruction; moving target imaging; target velocity estimation; synthetic aperture radar (SAR)
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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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Tan, W.; Xu, W.; Huang, P.; Huang, Z.; Qi, Y.; Han, K. Investigation of Azimuth Multichannel Reconstruction for Moving Targets in High Resolution Wide Swath SAR. Sensors 2017, 17, 1270.

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