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Proceedings Paper

Performance analysis of fast backprojection for synthetic-aperture radar processing
Author(s): Lars M.H. Ulander; Hans Hellsten; Gunnar Stenstroem
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Paper Abstract

Exact SAR inversion for a linear aperture may be obtained using fast transform techniques. Alternatively, backprojection in time domain may be used which can also handle general curved apertures. In the past, however, backprojection has seldom been used due to its heavy computational burden. We show in the paper that the backprojection method can be formulated as an exact recursive method based on factorization of the aperture. By sampling the backprojected data in local polar coordinates it is shown that the number of operations is drastically reduced and can be made to approach that of fast transform algorithms.

Paper Details

Date Published: 27 August 2001
PDF: 9 pages
Proc. SPIE 4382, Algorithms for Synthetic Aperture Radar Imagery VIII, (27 August 2001); doi: 10.1117/12.438204
Show Author Affiliations
Lars M.H. Ulander, Swedish Defence Research Agency (Sweden)
Hans Hellsten, Swedish Defence Research Agency (Sweden)
Gunnar Stenstroem, Swedish Defence Research Agency (Sweden)

Published in SPIE Proceedings Vol. 4382:
Algorithms for Synthetic Aperture Radar Imagery VIII
Edmund G. Zelnio, Editor(s)

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