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Article: Time-domain inverse scattering using the local shape function (LSF) method

TitleTime-domain inverse scattering using the local shape function (LSF) method
Authors
Issue Date1993
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/ip
Citation
Inverse Problems, 1993, v. 9 n. 5, p. 551-564 How to Cite?
AbstractA non-linear inverse scattering algorithm is presented that uses a local shape function (LSF) approximation to parametrize very strong scatterers in the presence of a transient excitation source. The LSF approximation was presented recently in the context of continuous-wave (CW) excitation and was shown to give good reconstructions of strong scatterers such as metallic objects. It is shown that the local (binary) shape function may be implemented as a volumetric boundary condition in a finite-difference time domain (FDTD) forward scattering solver. The inverse scattering problem is then cast as a non-linear optimization problem where the N-dimensional Frechet derivative of the scattered field is computed as a single backpropagation and correlation using the FDTD forward solver. Connection between the new algorithm and a similar method employing the distorted Born approximation is shown. Computer simulations show that the LSF method employing a FDTD forward solver has superior convergence properties over the corresponding distorted-Born algorithm.
Persistent Identifierhttp://hdl.handle.net/10722/182439
ISSN
2015 Impact Factor: 1.651
2015 SCImago Journal Rankings: 1.462
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWeedon, WHen_US
dc.contributor.authorChew, WCen_US
dc.date.accessioned2013-05-02T05:15:21Z-
dc.date.available2013-05-02T05:15:21Z-
dc.date.issued1993en_US
dc.identifier.citationInverse Problems, 1993, v. 9 n. 5, p. 551-564en_US
dc.identifier.issn0266-5611en_US
dc.identifier.urihttp://hdl.handle.net/10722/182439-
dc.description.abstractA non-linear inverse scattering algorithm is presented that uses a local shape function (LSF) approximation to parametrize very strong scatterers in the presence of a transient excitation source. The LSF approximation was presented recently in the context of continuous-wave (CW) excitation and was shown to give good reconstructions of strong scatterers such as metallic objects. It is shown that the local (binary) shape function may be implemented as a volumetric boundary condition in a finite-difference time domain (FDTD) forward scattering solver. The inverse scattering problem is then cast as a non-linear optimization problem where the N-dimensional Frechet derivative of the scattered field is computed as a single backpropagation and correlation using the FDTD forward solver. Connection between the new algorithm and a similar method employing the distorted Born approximation is shown. Computer simulations show that the LSF method employing a FDTD forward solver has superior convergence properties over the corresponding distorted-Born algorithm.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/ipen_US
dc.relation.ispartofInverse Problemsen_US
dc.titleTime-domain inverse scattering using the local shape function (LSF) methoden_US
dc.typeArticleen_US
dc.identifier.emailChew, WC: wcchew@hku.hken_US
dc.identifier.authorityChew, WC=rp00656en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0266-5611/9/5/005en_US
dc.identifier.scopuseid_2-s2.0-0000730578en_US
dc.identifier.volume9en_US
dc.identifier.issue5en_US
dc.identifier.spage551en_US
dc.identifier.epage564en_US
dc.identifier.isiWOS:A1993MF22300005-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridWeedon, WH=6603557203en_US
dc.identifier.scopusauthoridChew, WC=36014436300en_US

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