Spectral Subband Analysis for Azimuth Ambiguity Discrimination

Conference: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
05/16/2006 - 05/18/2006 at Dresden, Germany

Proceedings: EUSAR 2006

Pages: 4Language: englishTyp: PDF

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Leroy, François; Marraud, Denis (EADS DCS – Signal & Image Processing Laboratory (LTIS), 6 rue Dewoitine, 78142 Vélizy, France)
Closa, Josep (ALTAMIRA Information, C/Corsega, 381-387 2n 3a E-08037 Barcelona, Spain)
Souyris, Jean-Claude; Tison, Céline (CNES, DCT, SI/AR, 18 av. Edouard Belin, 31401 Toulouse Cedex 9, France)

This paper discusses possibilities for spectral subband analysis for ambiguity vs. target discrimination. Wrong range migration corrections and defocusing would lead ambiguous scatterers to have specific spectral behaviors. Subband analysis is achieved in two different ways either by moving a fixed size subband over the whole spectrum or by using multiple subband sizes in a multiresolution approach. We have defined a set of relatively simple features to characterize ambiguous scatterers in reconstructed sublooks. The discriminative nature of these features is evaluated over various data sets, including satellite and airborne, real and simulated data.