title   
  

Joint space aspect reconstruction of wide-angle SAR exploiting sparsity

Stojanovic, Ivana and Çetin, Müjdat and Karl, W. Clem (2008) Joint space aspect reconstruction of wide-angle SAR exploiting sparsity. In: SPIE Defense and Security Symposium, Algorithms for Synthetic Aperture Radar Imagery XV, Orlando, Florida, USA

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Official URL: http://dx.doi.org/10.1117/12.786288

Abstract

In this paper we present an algorithm for wide-angle synthetic aperture radar (SAR) image formation. Reconstruction of wide-angle SAR holds a promise of higher resolution and better information about a scene, but it also poses a number of challenges when compared to the traditional narrow-angle SAR. Most prominently, the isotropic point scattering model is no longer valid. We present an algorithm capable of producing high resolution reflectivity maps in both space and aspect, thus accounting for the anisotropic scattering behavior of targets. We pose the problem as a non-parametric three-dimensional inversion problem, with two constraints: magnitudes of the backscattered power are highly correlated across closely spaced look angles and the backscattered power originates from a small set of point scatterers. This approach considers jointly all scatterers in the scene across all azimuths, and exploits the sparsity of the underlying scattering field. We implement the algorithm and present reconstruction results on realistic data obtained from the XPatch Backhoe dataset.

Item Type:Papers in Conference Proceedings
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
ID Code:10524
Deposited By:Müjdat Çetin
Deposited On:11 Nov 2008 22:57
Last Modified:11 Nov 2008 22:57

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