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Article: Time-domain inverse scattering using the local shape function (LSF) method
Title | Time-domain inverse scattering using the local shape function (LSF) method |
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Authors | |
Issue Date | 1993 |
Publisher | Institute 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? |
Abstract | A 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 Identifier | http://hdl.handle.net/10722/182439 |
ISSN | 2023 Impact Factor: 2.0 2023 SCImago Journal Rankings: 1.185 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Weedon, WH | en_US |
dc.contributor.author | Chew, WC | en_US |
dc.date.accessioned | 2013-05-02T05:15:21Z | - |
dc.date.available | 2013-05-02T05:15:21Z | - |
dc.date.issued | 1993 | en_US |
dc.identifier.citation | Inverse Problems, 1993, v. 9 n. 5, p. 551-564 | en_US |
dc.identifier.issn | 0266-5611 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/182439 | - |
dc.description.abstract | A 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.language | eng | en_US |
dc.publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/ip | en_US |
dc.relation.ispartof | Inverse Problems | en_US |
dc.title | Time-domain inverse scattering using the local shape function (LSF) method | en_US |
dc.type | Article | en_US |
dc.identifier.email | Chew, WC: wcchew@hku.hk | en_US |
dc.identifier.authority | Chew, WC=rp00656 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1088/0266-5611/9/5/005 | en_US |
dc.identifier.scopus | eid_2-s2.0-0000730578 | en_US |
dc.identifier.volume | 9 | en_US |
dc.identifier.issue | 5 | en_US |
dc.identifier.spage | 551 | en_US |
dc.identifier.epage | 564 | en_US |
dc.identifier.isi | WOS:A1993MF22300005 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Weedon, WH=6603557203 | en_US |
dc.identifier.scopusauthorid | Chew, WC=36014436300 | en_US |
dc.identifier.issnl | 0266-5611 | - |