High-Precision Spotlight SAR Imaging with Joint Modified Fast Factorized Backprojection and Autofocus
Joint Authors
Zhang, Man
Li, Haolin
Wang, Guanyong
Source
International Journal of Antennas and Propagation
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-08-25
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Fast factorized backprojection (FFBP) takes advantage of high accuracy of time-domain algorithms while also possessing high efficiency comparable with conventional frequency domain algorithms.
When phase errors need to be compensated for high-resolution synthetic aperture radar (SAR) imaging, however, neither polar formatted subimages within FFBP flow nor the final Cartesian image formed by FFBP is suitable for phase gradient autofocus (PGA).
This is because these kinds of images are not capable of providing PGA with a clear Fourier transform relationship (FTR) between image domain and range-compressed phase history domain.
In this paper, we make some essential modifications to the original FFBP and present a scheme to incorporate overlapped-subaperture frame for an accurate PGA processing.
The raw data collected by an airborne high-resolution spotlight SAR are used to demonstrate the performance of this algorithm.
American Psychological Association (APA)
Zhang, Man& Li, Haolin& Wang, Guanyong. 2020. High-Precision Spotlight SAR Imaging with Joint Modified Fast Factorized Backprojection and Autofocus. International Journal of Antennas and Propagation،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1168749
Modern Language Association (MLA)
Zhang, Man…[et al.]. High-Precision Spotlight SAR Imaging with Joint Modified Fast Factorized Backprojection and Autofocus. International Journal of Antennas and Propagation No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1168749
American Medical Association (AMA)
Zhang, Man& Li, Haolin& Wang, Guanyong. High-Precision Spotlight SAR Imaging with Joint Modified Fast Factorized Backprojection and Autofocus. International Journal of Antennas and Propagation. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1168749
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1168749