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  • Research Article
  • Open Access

Efficient and Precise Processing for Squinted Spotlight SAR through a Modified Stolt Mapping

EURASIP Journal on Advances in Signal Processing20062007:059704

https://doi.org/10.1155/2007/59704

  • Received: 26 January 2006
  • Accepted: 29 August 2006
  • Published:

Abstract

Processing of squinted SAR spotlight data is a challenge because of the significant range migration effects of the raw data over the coherent aperture time. Although in theory the ( )-algorithm takes care of these aspects, its digital implementation requires a time-consuming interpolation step. Moreover, the limited precision of this interpolation can introduce distortions at the edges of the final image especially for squinted geometries. A wave number domain processing using a modified Stolt mapping will be developed and analyzed to enhance the quality of the final SAR image. Additionally, the proposed algorithm has a decreased computational load compared to the original ( )-algorithm. Simulation results will validate the focusing and efficiency performances of the modified wave number domain algorithm.

Keywords

  • Migration
  • Information Technology
  • Quantum Information
  • Efficiency Performance
  • Computational Load

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Authors’ Affiliations

(1)
Optronics and Microwave Department, Royal Military Academy, Renaissancelaan 30, Brussel, 1000, Belgium
(2)
Deutsches Zentrum für Luft-und Raumfahrt (DLR) e.V., Postfach 1116, Wessling, 82230, Germany

References

  1. Cumming IG, Wong FH: Digital Processing of Synthetic Aperture Radar Data. Artech House, Boston, Mass, USA; 2005. chapter 5, 8Google Scholar
  2. Carrara WG, Goodman RS, Majewski RM: Spotlight SAR Signal Processing Algorithms. Artech House, Boston, Mass, USA; 1995. chapter 10MATHGoogle Scholar
  3. Bamler R: A comparison of range-Doppler and wavenumber domain SAR focusing algorithms. IEEE Transactions on Geoscience and Remote Sensing 1992,30(4):706-713. 10.1109/36.158864View ArticleGoogle Scholar
  4. Fornaro G, Sansosti E, Lanari R, Tesauro M: Role of processing geometry in SAR raw data focusing. IEEE Transactions on Aerospace and Electronic Systems 2002,38(2):441-454. 10.1109/TAES.2002.1008978View ArticleGoogle Scholar
  5. Gough PT, Hawkins DW: Unified framework for modern synthetic aperture imaging algorithms. International Journal of Imaging Systems and Technology 1997,8(4):343-358. 10.1002/(SICI)1098-1098(1997)8:4<343::AID-IMA2>3.0.CO;2-AView ArticleGoogle Scholar
  6. Fornaro G, Franceschetti G, Perna S: Motion compensation of squinted airborne SAR raw data: role of processing geometry. Proceedings of IEEE International Geoscience and Remote Sensing Symposium (IGARSS '04), September 2004, Anchorage, Alaska, USA 2: 1518-1521.Google Scholar
  7. Berens P: Extended range migration algorithm for squinted spotlight SAR. Proceedings of IEEE International Geoscience and Remote Sensing Symposium (IGARSS '03), July 2003, Toulouse, France 6: 4053-4055.Google Scholar
  8. Berens P: Efficient wave number domain processing for squinted spotlight SAR. Proceedings of 5th European Conference on Synthetic Aperture Radar (EUSAR '04), May 2004, Ulm, Germany 1: 171-174.Google Scholar
  9. Soumekh M: SAR Signal Processing. John Wiley & Sons, New York, NY, USA; 1999.MATHGoogle Scholar

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