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An integral equation approach to the prediction of indoor wave propagation
Author(s) -
De Backer Bernard,
Olyslager Frank,
De Zutter Daniël
Publication year - 1997
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/97rs01400
Subject(s) - method of moments (probability theory) , integral equation , moment (physics) , conjugate gradient method , matrix (chemical analysis) , transformation (genetics) , sparse matrix , boundary (topology) , impedance parameters , transformation matrix , computer science , wave equation , mathematical analysis , mathematics , electrical impedance , algorithm , mathematical optimization , physics , classical mechanics , biochemistry , statistics , materials science , chemistry , kinematics , quantum mechanics , estimator , gaussian , composite material , gene
A two‐dimensional method of moments solution technique for the simulation of electrically large structures is presented. This technique is based on a boundary integral equation description, and was designed to keep CPU time and memory requirements within acceptable limits even for problems of several thousands of unknowns. This is achieved through an optimized calculation of the interaction integrals leading to the moment method interaction matrix and through a so‐called impedance matrix transformation of this matrix to a sparse form. The resulting sparse system of linear equations is efficiently solved using a conjugate gradient algorithm. The entire solution technique is applied to the simulation of indoor wave propagation problems and is illustrated by two examples.