Geodesic
Numerical linear algebra for nonlinear microwave imaging
Electronic transactions on numerical analysis, Tome 33 (2009)
A nonlinear inverse scattering problem arising in microwave imaging is analyzed and numerically solved. In particular, the dielectric properties of an inhomogeneous object (i.e., the image to restore) are retrieved by means of its scattered microwave electromagnetic field (i.e., the input data) in a tomographic arrangement. From a theoretical point of view, the model gives rise to a nonlinear integral equation, which is solved by a deterministic and regularizing inexact Gauss-Newton method. At each step of the method, matrix strategies of numerical linear algebra are considered in order to reduce the computational (time and memory) load for solving the obtained large and structured linear systems. These strategies involve block decompositions, splitting and regularization, and superresolution techniques. Some numerical results are given where the proposed algorithm is applied to recover high resolution images of the scatterers.
Classification : 65F22, 65R32, 45Q05, 78A46
Keywords: inverse scattering, microwave imaging, inexact-Newton methods, block decomposition, regularization 
@article{ETNA_2009__33__a5,
     author = {Di Benedetto,  Fabio and Estatico,  Claudio and Nagy,  James G. and Pastorino,  Matteo},
     title = {Numerical linear algebra for nonlinear microwave imaging},
     journal = {Electronic transactions on numerical analysis},
     year = {2009},
     volume = {33},
     zbl = {1208.78018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2009__33__a5/}
}
TY  - JOUR
AU  - Di Benedetto,  Fabio
AU  - Estatico,  Claudio
AU  - Nagy,  James G.
AU  - Pastorino,  Matteo
TI  - Numerical linear algebra for nonlinear microwave imaging
JO  - Electronic transactions on numerical analysis
PY  - 2009
VL  - 33
UR  - http://geodesic.mathdoc.fr/item/ETNA_2009__33__a5/
LA  - en
ID  - ETNA_2009__33__a5
ER  - 
%0 Journal Article
%A Di Benedetto,  Fabio
%A Estatico,  Claudio
%A Nagy,  James G.
%A Pastorino,  Matteo
%T Numerical linear algebra for nonlinear microwave imaging
%J Electronic transactions on numerical analysis
%D 2009
%V 33
%U http://geodesic.mathdoc.fr/item/ETNA_2009__33__a5/
%G en
%F ETNA_2009__33__a5
Di Benedetto,  Fabio; Estatico,  Claudio; Nagy,  James G.; Pastorino,  Matteo. Numerical linear algebra for nonlinear microwave imaging. Electronic transactions on numerical analysis, Tome 33 (2009). http://geodesic.mathdoc.fr/item/ETNA_2009__33__a5/