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Journal of Sensors
Volume 2015 (2015), Article ID 293141, 11 pages
http://dx.doi.org/10.1155/2015/293141
Research Article

Superresolution Polarimetric ISAR Imaging Based on 2D CP-GTD Model

College of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, China

Received 24 December 2014; Accepted 20 April 2015

Academic Editor: Jong-Sen Lee

Copyright © 2015 Da-hai Dai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presented a new approach to superresolution ISAR imaging based on a scattering model called coherent polarized geometrical theory of diffraction (CP-GTD) which is better matched to the physical scattering mechanism. The algorithm is a joint processing between polarization and superresolution essentially. It can also estimate the number, position, frequency dependence, span, and normalized scattering matrix of scattering centers instantaneously for each channel rather than the one which extracts parameters from each channel separately, and its performance is better than the latter because the fully polarized information is used. The superiority of the CP-GTD is verified by experiment results based on simulated and real data.