Application of iterative techniques for electromagnetic wave scattering from dielectric random rough surfaces

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buir.advisorErtürk, Vakur B.
dc.contributor.authorİnan, Kıvanç
dc.date.accessioned2016-07-01T11:03:03Z
dc.date.available2016-07-01T11:03:03Z
dc.date.issued2005
dc.descriptionCataloged from PDF version of article.en_US
dc.description.abstractMobile radio planning requires accurate prediction of electromagnetic field strengths over large terrain profiles. However the conventional method of moments (MoM) becomes unsuitable for electrically large rough dielectric surfaces, because of the O(N³) computational cost due to the large number of surface unknowns N. Iterative Methods are beneficial methods for faster electromagnetic problem solutions. By using such methods, very accurate results can be achieved, causing a computational cost of O(N²). In this work, among the stationary iterative methods; Forward-Backward Method (FBM), and among the nonstationary iterative ones; Conjugate Gradient Squared (CGS), BiConjugate Gradient Stabilized (Bi-CGSTAB) and Quasi Minimal Residual (QMR) Methods are presented to investigate the electromagnetic wave scattering from dielectric random rough surfaces. These techniques are compared to each other over various kinds of surface models that reflect the real terrains to find out the best solution methodologies. Furthermore, efficiency of the methods are assessed by comparing the obtained scattering results, normalized radar cross sections (NRCS) of the surfaces considered, with the numerically exact ones computed by employing the MoM.en_US
dc.description.provenanceMade available in DSpace on 2016-07-01T11:03:03Z (GMT). No. of bitstreams: 1 0002866.pdf: 658681 bytes, checksum: 00c27386eb868835e716cd9ae835a0d7 (MD5) Previous issue date: 2005en
dc.description.statementofresponsibilityİnan, Kıvançen_US
dc.format.extentxv, 97 leavesen_US
dc.identifier.itemidBILKUTUPB092625
dc.identifier.urihttp://hdl.handle.net/11693/29672
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectRandom Rough Surface Scatteringen_US
dc.subjectMethod of Moments (MoM)en_US
dc.subjectForward-Backward Method (FBM)en_US
dc.subjectConjugate Gradient Squared Method (CGS)en_US
dc.subjectBiConjugate Gradient Stabilized Method (Bi-CGSTAB)en_US
dc.subjectQuasi Minimal Residual Method (QMR)en_US
dc.subjectNormalized Radar Cross Section (NRCS)en_US
dc.subject.lccQC760 .I53 2005en_US
dc.subject.lcshElectromagnetism.en_US
dc.titleApplication of iterative techniques for electromagnetic wave scattering from dielectric random rough surfacesen_US
dc.typeThesisen_US
thesis.degree.disciplineElectrical and Electronic Engineering
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

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