Back-projection SAR imaging using FFT

Ariel Gaibel, Amir Boag

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper describes a novel method based on the back-projection approach to generate SAR images. The back-projection operation has various 'fast' implementations all using multilevel algorithms. In this paper a back-projection algorithm using the Fast Fourier Transform (FFT) is proposed. The basic method does not employ interpolation by using non uniform sampling, and it obtains the same results as the straightforward computation, with O(N2logN) instead of O(N4) complexity. This method is optimal for SPOT mode and for wide-band scenarios, however to expand the algorithm flexibility two additional implementations are presented. As opposed to the basic method which does not use interpolation at all, these implementations require interpolation in the imaging process, but the error introduced is negligible.

Original languageEnglish
Title of host publication2016 13th European Radar Conference, EuRAD 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9782874870453
StatePublished - 2016
Event13th European Radar Conference, EuRAD 2016 - London, United Kingdom
Duration: 5 Oct 20167 Oct 2016

Publication series

Name2016 13th European Radar Conference, EuRAD 2016


Conference13th European Radar Conference, EuRAD 2016
Country/TerritoryUnited Kingdom


  • radar imaging
  • synthetic aperture radar

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Computer Networks and Communications


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