Doppler Centroid Estimation with Quality Assessment for Real-Time SAR Imaging

Yu Chieh Lee, Pei Yun Tsai, Sz Yuan Lee

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

1 Scopus citations

Abstract

The range Doppler algorithm (RDA) is widely used for synthetic aperture radar (SAR) imaging. Correct estimation for Doppler centroid is essential for range cell migration correction, azimuth compression, secondary range compression in RDA. This paper presents two methods to assess and improve the Doppler parameter estimation results. The symmetry of the Doppler spectrum is examined to evaluate the quality of coarse estimation of baseband Doppler centroid and the weighted least squares algorithm is used to derive the refined results. Selective window and weighted combining based on the quality index of the average power are adopted for detecting Doppler ambiguity. From the simulation results, we show that the proposed techniques with the appropriate quality index can improve the performance of estimation compared to the conventional schemes for real-time SAR signal processing.

Original languageEnglish
Title of host publication2020 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages36-40
Number of pages5
ISBN (Electronic)9789881476883
StatePublished - 7 Dec 2020
Event2020 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2020 - Virtual, Auckland, New Zealand
Duration: 7 Dec 202010 Dec 2020

Publication series

Name2020 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2020 - Proceedings

Conference

Conference2020 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2020
Country/TerritoryNew Zealand
CityVirtual, Auckland
Period7/12/2010/12/20

Keywords

  • Doppler ambiguity.
  • Doppler centroid estimation
  • Synthetic Aperture Radar

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