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Sensors 2017, 17(2), 220; doi:10.3390/s17020220

A Modified Azimuth Weighting Method in a Two-Step Process Approach for Sliding Spotlight Data Processing

Beijing Key Laboratory of Embedded Real-time Information Processing Technology, 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: Jonathan Li
Received: 7 November 2016 / Revised: 19 January 2017 / Accepted: 20 January 2017 / Published: 24 January 2017
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [6832 KB, uploaded 24 January 2017]   |  

Abstract

Low sidelobes are important and essential in all SAR (Synthetic Aperture Radar) images, regardless of the imaging mode, for fewer artificial targets. For strip-map mode all targets overlap in frequency, which is convenient to suppress sidelobes. However, weighting requires total overlap in the time or frequency domain, which a sliding spotlight signal could not satisfy. Furthermore, the wavelength cannot be regarded as a constant value under the condition of a wideband chirp signal, which leads to the variation of the Doppler bandwidth along with the range frequency. In this article, an azimuth weighting method is proposed that considers the influence of a wideband based on a two-step algorithm. The computer simulation is given to verify the presented method. View Full-Text
Keywords: weighting method; two-step processing approach; sliding spotlight; synthetic aperture radar (SAR) weighting method; two-step processing approach; sliding spotlight; 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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Xiao, F.; Ding, Z.-G.; Xiong, B.; Long, T. A Modified Azimuth Weighting Method in a Two-Step Process Approach for Sliding Spotlight Data Processing. Sensors 2017, 17, 220.

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