Fast Factorized Back-Projection for Bistatic SAR Processing

Conference: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
06/07/2010 - 06/10/2010 at Aachen, Germany

Proceedings: EUSAR 2010

Pages: 4Language: englishTyp: PDF

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Ulander, Lars M. H.; Frölind, Per-Olov; Gustavsson, Anders; Murdin, Daniel; Stenström, Gunnar (Swedish Defence Research Agency (FOI), Linköping, Sweden)

Time-domain back-projection is able to generate focused synthetic-aperture radar images for the most general geometries but at the expense of high computational burden. With the advent of the fast factorized back-projection algorithm, however, it is now possible to achieve computational performance in parity with frequency-domain algorithms and without the restrictions on data symmetry of the latter. In the paper, we show that the fast factorized back-projection algorithm can also be extended to bistatic SAR data with retained computational performance. Image results are presented based on bistatic VHF/UHF-band registrations acquired with the two airborne SAR sensors LORA and SETHI.