Volume 4 Issue 5
Nov.  2015
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Article Navigation >  Journal of Radars  > 2015  >  4(5): 591-599
Zhao Yi-chao, Zhu Yu-tao, Su Yi, Yang Meng. Two-dimensional Fast ESPRIT Algorithm for Linear Array SAR Imaging[J]. Journal of Radars, 2015, 4(5): 591-599. doi: 10.12000/JR15065
Citation: Zhao Yi-chao, Zhu Yu-tao, Su Yi, Yang Meng. Two-dimensional Fast ESPRIT Algorithm for Linear Array SAR Imaging[J]. Journal of Radars, 2015, 4(5): 591-599. doi: 10.12000/JR15065
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Two-dimensional Fast ESPRIT Algorithm for Linear Array SAR Imaging

doi: 10.12000/JR15065

  • (School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)

Funds:

China Postdoctoral Science Foundation (2014M562647)

  • Received Date: 2015-05-27
  • Rev Recd Date: 2015-09-22
  • Publish Date: 2015-10-28
    Abstract
  • The linear array Synthetic Aperture Radar (SAR) system is a popular research tool, because it can realize three-dimensional imaging. However, owning to limitations of the aircraft platform and actual conditions, resolution improvement is difficult in cross-track and along-track directions. In this study, a twodimensional fast Estimation of Signal Parameters by Rotational Invariance Technique (ESPRIT) algorithm for linear array SAR imaging is proposed to overcome these limitations. This approach combines the Gerschgorin disks method and the ESPRIT algorithm to estimate the positions of scatterers in cross and along-rack directions. Moreover, the reflectivity of scatterers is obtained by a modified pairing method based on region growing, replacing the least-squares method. The simulation results demonstrate the applicability of the algorithm with high resolution, quick calculation, and good real-time response.

     

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