DocumentCode :
901339
Title :
On the Effect of Support Estimation and of a New Model in 2-D Inverse Scattering Problems
Author :
Catapano, Ilaria ; Crocco, Lorenzo ; D´Urso, Michele ; Isernia, Tommaso
Author_Institution :
IREA-CNR, Napoli
Volume :
55
Issue :
6
fYear :
2007
fDate :
6/1/2007 12:00:00 AM
Firstpage :
1895
Lastpage :
1899
Abstract :
Starting from the concept of "degree of non-linearity" of the relationship amongst unknown parameters and scattered fields, we discuss how knowledge of the geometrical features of the targets favorably affects the solution of inverse scattering problems. The same concept is also exploited to optimize the contrast source-extended Born (CS-EB) model, resulting in the optimized CS-EB (O-CS-EB) inversion approach, which remarkably reduces false solutions occurrence. Then, a two-steps approach is proposed as a reliable and effective inversion strategy. The first step consists in retrieving the shape of the targets using the linear sampling method, while in the second step, the estimated shapes and the O-CS-EB are exploited to reconstruct the permittivity profile. The approach has been tested against experimental data, showing that very accurate reconstructions are achieved from monochromatic data.
Keywords :
electromagnetic wave scattering; estimation theory; image reconstruction; inverse problems; permittivity; sampling methods; 2D inverse scattering problems; contrast source-extended Born model; geometrical features; linear sampling; permittivity profile; scattered fields; support estimation; Electromagnetic scattering; Image reconstruction; Inverse problems; Optimization methods; Permittivity; Sampling methods; Scattering parameters; Shape; Solid modeling; Testing; Contrast source-extended Born (CS-EB); electromagnetic inverse scattering problems; shape reconstruction;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2007.898647
Filename :
4232612
Link To Document :
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