Wang, P., Liu, W., Chen, J. et al. (2 more authors) (2015) Higher order nonlinear chirp scaling algorithm for medium Earth orbit synthetic aperture radar. Journal of Applied Remote Sensing , 9 (1). 096084. ISSN 1931-3195
Abstract
Due to the larger orbital arc and longer synthetic aperture time in medium Earth orbit (MEO) synthetic aperture radar (SAR), it is difficult for conventional SAR imaging algorithms to achieve a good imaging result. An improved higher order nonlinear chirp scaling (NLCS) algorithm is presented for MEO SAR imaging. First, the point target spectrum of the modified equivalent squint range model-based signal is derived, where a concise expression is obtained by the method of series reversion. Second, the well-known NLCS algorithm is modified according to the new spectrum and an improved algorithm is developed. The range dependence of the two-dimensional point target reference spectrum is removed by improved CS processing, and accurate focusing is realized through range-matched filter and range-dependent azimuth-matched filter. Simulations are performed to validate the presented algorithm.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/). Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. |
Keywords: | synthetic aperture radar; medium Earth orbit; synthetic aperture radar signal processing |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 18 Jan 2016 15:11 |
Last Modified: | 18 Jan 2016 15:11 |
Published Version: | http://dx.doi.org/10.1117/1.JRS.9.096084 |
Status: | Published |
Publisher: | Society of Photo-optical Instrumentation Engineers |
Refereed: | Yes |
Identification Number: | 10.1117/1.JRS.9.096084 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:93745 |