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Conference Paper: Three-dimensional microwave imaging by local shape function method with CGFFT

TitleThree-dimensional microwave imaging by local shape function method with CGFFT
Authors
Issue Date1996
Citation
Ieee Antennas And Propagation Society, Ap-S International Symposium (Digest), 1996, v. 3, p. 2148-2151 How to Cite?
AbstractThis paper proposes the local shape function method (LSF) with CGFFT T-matrix method to reconstruct object permittivity in three dimensions. The algorithm accounts for multiple scattering by casting the inverse problem into a minimization problem, and iteratively minimizing the difference between the measured and calculated fields from the current object profile. In 3D scattering, the dyadic Green's function singularity needs a more cautious treatment, while LSF avoids the singularity problem by matching the boundary condition at the surface of each subscatterer instead of at the center, which yields a less nonlinear inverse problem compared with other techniques. At each step of the minimization process, numerous forward problems corresponding to different transmitters have to be solved efficiently. Thus, CGFFT T-matrix method is chosen to achieve this end, and the computational cost of the algorithms can be O(NTN log N), where NT and N are the number of transmitters and that of discretized cells, respectively. Some numerical examples are presented to show that LSF can reconstruct the permittivity with high fidelity.
Persistent Identifierhttp://hdl.handle.net/10722/182859
ISSN

 

DC FieldValueLanguage
dc.contributor.authorLin, JiunHwaen_US
dc.contributor.authorChew, Weng Choen_US
dc.date.accessioned2013-05-02T05:17:22Z-
dc.date.available2013-05-02T05:17:22Z-
dc.date.issued1996en_US
dc.identifier.citationIeee Antennas And Propagation Society, Ap-S International Symposium (Digest), 1996, v. 3, p. 2148-2151en_US
dc.identifier.issn0272-4693en_US
dc.identifier.urihttp://hdl.handle.net/10722/182859-
dc.description.abstractThis paper proposes the local shape function method (LSF) with CGFFT T-matrix method to reconstruct object permittivity in three dimensions. The algorithm accounts for multiple scattering by casting the inverse problem into a minimization problem, and iteratively minimizing the difference between the measured and calculated fields from the current object profile. In 3D scattering, the dyadic Green's function singularity needs a more cautious treatment, while LSF avoids the singularity problem by matching the boundary condition at the surface of each subscatterer instead of at the center, which yields a less nonlinear inverse problem compared with other techniques. At each step of the minimization process, numerous forward problems corresponding to different transmitters have to be solved efficiently. Thus, CGFFT T-matrix method is chosen to achieve this end, and the computational cost of the algorithms can be O(NTN log N), where NT and N are the number of transmitters and that of discretized cells, respectively. Some numerical examples are presented to show that LSF can reconstruct the permittivity with high fidelity.en_US
dc.languageengen_US
dc.relation.ispartofIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)en_US
dc.titleThree-dimensional microwave imaging by local shape function method with CGFFTen_US
dc.typeConference_Paperen_US
dc.identifier.emailChew, Weng Cho: wcchew@hku.hken_US
dc.identifier.authorityChew, Weng Cho=rp00656en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0029766369en_US
dc.identifier.volume3en_US
dc.identifier.spage2148en_US
dc.identifier.epage2151en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLin, JiunHwa=14121639400en_US
dc.identifier.scopusauthoridChew, Weng Cho=36014436300en_US

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