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Volume 34 Issue 11
Nov.  2008
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Journal of Beijing University of Aeronautics and Astronautics  > 2008  >  34(11): 1315-1318.
Zhang Kunhui. Fast algorithm for airborne SAR range cell migration correction[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(11): 1315-1318. (in Chinese)
Citation: Zhang Kunhui. Fast algorithm for airborne SAR range cell migration correction[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(11): 1315-1318. (in Chinese)
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Fast algorithm for airborne SAR range cell migration correction

  • School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 05 Dec 2007
  • Publish Date: 30 Nov 2008
    Abstract
  • The range-Doppler algorithm is quite popular in airborne synthetic aperture radar (SAR) image formation. To reduce the excessive computation load associated with the pixel by pixel interpolation required in traditional range Doppler algorithm (RDA) to remove range cell migration (RCM), a fast and interpolation-free range cell migration correction(RCMC) technique which only involves operations of two FFTs and one complex multiplication was proposed. Based on the analysis of echo signal model, the constraint on attainable maximum swath with such a fast RCMC technique was derived, and the relation between this constraint and the imaging resolution was also given. The analysis was validated by simulation results. The theoretical analysis, simulation and SAR real data processing result show that this technique can reduce the computational burden dramatically with high enough precision, and is amenable to on-board real time processing.

     

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  • [1] Curlander J C. McDonough R N. Synthetic aperture radar systems and signal processing[M]. New York: John Wiley & Sons, Inc,1991 [2] Bamler R. A comparision of range-doppler and wavenumber domain SAR focusing algorithms[J]. IEEE Trans On GRS, 1992, 30(4):706-713 [3] Raney R K, Runge H, Bamler R, et al. Precision SAR processing using chirp scaling[J]. IEEE Trans On GRS, 1994, 32(4):786-799 [4] Madsen S N. The danish SAR system: design and initial test[J]. IEEE Trans On GRS, 1991, 29(3):417-425 [5] 禹卫东.合成孔径雷达信号处理研究 .南京:南京航空航天大学电子工程系,1997 Yu Weidong. Studies on synthetic aperture radar signal processing .Nanjing: Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, 1997(in Chinese) [6] Oppenheim A V, Schafer R W. Digital signal processing[M]. Englewood Cliffs: Prentice-Hall, 1975 [7] Carrara W G, Goodman R S, Majewski R M. Spotlight synthetic aperture radar: signal processing algorithms[M]. Norwood MA: Artech House, 1995
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