Improved Forward Backward Method With Spectral Acceleration for Scattering From Randomly Rough Lossy Surfaces

An efficient and accurate iterative method is proposed for computing electromagnetic (EM) scattering from 1-D dielectric rough surfaces. The communication improves the convergence of forward backward method, applying it to the problem of 2D wave scattering from random lossy rough surfaces using a co...

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Vydáno v:	IEEE transactions on antennas and propagation Ročník 61; číslo 7; s. 3922 - 3926
Hlavní autoři:	Brennan, Conor, Dung Trinh-Xuan, Mullen, Marie, Bradley, Patrick, Condon, Marissa
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York, NY IEEE 01.07.2013 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Acceleration Algorithms Applied classical electromagnetism Applied sciences Convergence Correlation Diffraction, scattering, reflection Electromagnetic scattering Electromagnetic wave propagation, radiowave propagation Electromagnetism; electron and ion optics Exact sciences and technology forward backward method (FBM) Fundamental areas of phenomenology (including applications) integral equation (IE) iterative method method of moment (MoM) Physics Radiocommunications Radiowave propagation Rough surfaces Scattering Studies Surface roughness Surface waves Telecommunications Telecommunications and information theory Electromagnetic wave scattering Multiplication Moment method Matrix product Eigenvalue Lossy medium Iterative method Numerical method Rough surface Computational complexity forward backward method (FBM) Electromagnetic wave propagation Random surface Electromagnetic scattering Wave scattering Convergence rate Matrix method method of moment (MoM) Integral equation integral equation (IE)
ISSN:	0018-926X, 1558-2221
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Popis
Shrnutí:	An efficient and accurate iterative method is proposed for computing electromagnetic (EM) scattering from 1-D dielectric rough surfaces. The communication improves the convergence of forward backward method, applying it to the problem of 2D wave scattering from random lossy rough surfaces using a coupled surface integral equation formulation. A matrix splitting technique is introduced to reduce the number of matrix-vector multiplications required by the correction step and Spectral Acceleration (SA) is applied to reduce the computational complexity of each matrix-vector product from O(N 2 ) to O(N). The proposed method is called the improved forward backward method with spectral acceleration (IFBM-SA). The numerical analysis demonstrates that IFBM-SA has a higher convergence rate than FBM-SA and a recent technique which is used as a reference method. Moreover, IFBM-SA is more robust than the reference method and has smaller storage requirements meaning that it can readily scale to larger problems. In addition an eigenvalue based analysis is provided illustrating how the improvement step works.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14
ISSN:	0018-926X 1558-2221
DOI:	10.1109/TAP.2013.2255091