A Comparative Study of the Polar Version with the Subimage Version of Fast Factorized Backprojection in UWB SAR

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Thomas Sjögren, Viet Thuy Vu, Mats Pettersson
Title: A Comparative Study of the Polar Version with the Subimage Version of Fast Factorized Backprojection in UWB SAR
Conference name: International Radar Symposium
Year: 2008
Publisher: IEEE
City: Wroclaw
ISI number: 000260000000043
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
http://www.tek.bth.se/
Authors e-mail: tsj@bth.se
Language: English
Abstract: This paper presents a comparative study of the polar and the subimage based variants of the time domain SAR algorithm Fast Factorized Backprojection. The difference between the two variants with regard to the phase error, which causes defocusing in the image, is investigated. The difference between the algorithms in interpolation between stages is also discussed. To investigate the sidelobes in azimuth, the paper gives simulation results for a low frequency UWB SAR system for both algorithms. How the algorithms differ with regard to amount of beams and length of beams is also discussed.
Subject: Signal Processing\General
Signal Processing\Radar and Sonar
Keywords: SAR, Fast Factorized Backprojection, time domain algorithms
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