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A Novel Algorithm for Doppler Frequency Rate Estimation of Spaceborne Synthetic Aperture Radar

  • Shiqi Huang
  • Daizhi Liu
  • Liang Chen
  • Yunfeng Liu
Chapter
Part of the Lecture Notes in Control and Information Sciences book series (LNCIS, volume 344)

Abstract

Synthetic Aperture Radar (SAR) can obtain high-resolution radar images under all weather, day and night and long distance conditions, and has been applied widely in military and civil fields. Range-Doppler (RD) algorithm is a simple and typical imaging algorithm. The key of it is Doppler parameters estimations, including Doppler centroid frequency and Doppler frequency rate. Doppler frequency rate is variational with range. If the estimation of it is inaccurate, it will bring severe defocusing effect and blurring in azimuth direction. The previous estimations of Doppler frequency rate usually use image field instead of data field, the calculated amount is very large and the imaging speed is slow. In order to improve them, this paper proposes a novel Doppler frequency rate estimation algorithm for spaceborne SAR imaging. The raw data of ERS are used to test effectiveness and feasibility of this method.

Keywords

Synthetic Aperture Radar Synthetic Aperture Radar Imaging Account Scalar Autofocus Algorithm Spaceborne Synthetic Aperture Radar 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Shiqi Huang
    • 1
  • Daizhi Liu
    • 1
  • Liang Chen
    • 1
  • Yunfeng Liu
    • 1
  1. 1.Xi’an Research Inst. of Hi-TechHongqing Town, Xi’anP.R. China

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