Azimuth-variant compensation in subaperture processing of curved trajectory SAR

Y. Li, Z. Ding*, T. Long

*Corresponding author for this work

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

Abstract

Curved trajectory SAR has the variant velocity and attitude. The acceleration and vertical velocity increase the azimuth variation of Doppler rate when the supaperture processing is taken. The assumption of identical Doppler rate for targets of the same slant range no longer holds. As a result of that, the conventional SPECAN algorithm will defocus the targets far away from the centre of illumination region. In order to solve the problem, this paper proposes an azimuth-variant compensation method used in the subaperture processing of curved trajectory SAR. The method uses Fourier transform of short block in azimuth to divide the illumination region into several parts and to apply respective compensation. Two practical considerations of the compensation, the block size and the over-lapping rate of blocks, are analysed in detail. Simulation results verify the effectiveness of the compensation method.

Original languageEnglish
Title of host publicationIET International Conference on Radar Systems, Radar 2012
Edition603 CP
DOIs
Publication statusPublished - 2012
EventIET International Conference on Radar Systems, Radar 2012 - Glasgow, United Kingdom
Duration: 22 Oct 201225 Oct 2012

Publication series

NameIET Conference Publications
Number603 CP
Volume2012

Conference

ConferenceIET International Conference on Radar Systems, Radar 2012
Country/TerritoryUnited Kingdom
CityGlasgow
Period22/10/1225/10/12

Keywords

  • Aperture dependence
  • Azimuth-variant compensation
  • Curved trajectory SAR
  • Subaperture processing

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Li, Y., Ding, Z., & Long, T. (2012). Azimuth-variant compensation in subaperture processing of curved trajectory SAR. In IET International Conference on Radar Systems, Radar 2012 (603 CP ed.). Article 1720 (IET Conference Publications; Vol. 2012, No. 603 CP). https://doi.org/10.1049/cp.2012.1720