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      Two-dimensional Fast ESPRIT Algorithm for Linear Array SAR Imaging

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          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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          Author and article information

          Journal
          Journal of Radars
          Chinese Academy of Sciences
          01 October 2015
          : 4
          : 5
          : 591-599
          Affiliations
          [1 ] School of Electronic Science and Engineering, National University of Defense Technology
          Article
          0a803bcebc9643d789e573f9f746796f
          10.12000/JR15065

          This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

          Categories
          Technology (General)
          T1-995

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