Two-dimensional Fast ESPRIT Algorithm for Linear Array SAR Imaging
Zhao Yi-chao Zhu Yu-tao Su Yi Yang Meng
(School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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.
Key words ： Linear Array SAR (LASAR)
Estimation of Signal Parameters by Rotational Invariance Technique(ESPRIT) algorithm
Superresulotion
Imaging
Region growing
Received: 2015-05-27;
Published: 2015-10-27
Fund: China Postdoctoral Science Foundation (2014M562647)
Corresponding Authors: 10.12000/JR15065
E-mail: zhaoyichao1212@163.com
Cite this article:
. Two-dimensional Fast ESPRIT Algorithm for Linear Array SAR Imaging[J]. JOURNAL OF RADARS, 2015, 4(5): 591-599.
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2015, Vol. 4 
