NDLI: Multichannel Full-Aperture Azimuth Processing for Beam Steering SAR

Content Provider	IEEE Xplore Digital Library
Author	Guang-Cai Sun Mengdao Xing Xiang-Gen Xia Yufeng Wu Pingping Huang Yirong Wu Zheng Bao
Copyright Year	1980
Abstract	Terrain Observation by Progressive Scans (TOPS) synthetic aperture radar (SAR) and spotlight SAR are advanced SAR imaging modes for wide range swath and high resolution. In order to obtain a wider range coverage, azimuth multichannel is introduced in the literature. Since the azimuth bandwidth of beam steering SAR (BS-SAR; spotlight SAR, sliding spotlight SAR, or TOPS SAR) is much greater than that of a stripmap SAR, a signal reconstruction algorithm used for multichannel stripmap SAR may not be effective for multichannel BS-SAR. In this paper, a multichannel full-aperture azimuth processing algorithm is proposed for a BS-SAR. The key of this algorithm lies in the beam and the azimuth bandwidth compressions of multichannel signals in the Doppler-array and slow time-angle planes, respectively. Through compression processing, the beamwidth and the azimuth bandwidth are smaller than the available angle and equivalent pulse repeating frequency , respectively. Then, an improved post-Doppler STAP method is proposed to recover a 2-D spectrum. With the recovered signal, further processing can be utilized to focus the multichannel signal. Simulation and real data results show the effectiveness of the proposed algorithm.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	4761
Ending Page	4778
Page Count	18
File Size	1548702
File Format	PDF
ISSN	01962892
Volume Number	51
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Synthetic aperture radar Azimuth Imaging Bandwidth Doppler effect Image resolution Signal reconstruction Terrain Observation by Progressive Scans (TOPS) SAR Beam steering SAR (BS-SAR) sliding spotlight SAR spotlight SAR synthetic aperture radar (SAR)
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

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