Fast Implementation of FDTD-Compatible Green's Function on Multicore Processor

In this letter, numerically efficient implementation of the finite-difference time domain (FDTD)-compatible Green's function on a multicore processor is presented. Recently, closed-form expression of this discrete Green's function (DGF) was derived, which simplifies its application in the...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters Vol. 11; pp. 81 - 84
Main Author: Stefanski, T. P.
Format: Journal Article
Language:English
Published: IEEE 2012
Subjects:
Antennas
Computational electromagnetics
Finite difference methods
finite-difference time domain (FDTD) methods
Green's function methods
Indexes
Multicore processing
parallel processing
Runtime
Time domain analysis
ISSN:1536-1225, 1548-5757
Online Access:Get full text
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Summary:In this letter, numerically efficient implementation of the finite-difference time domain (FDTD)-compatible Green's function on a multicore processor is presented. Recently, closed-form expression of this discrete Green's function (DGF) was derived, which simplifies its application in the FDTD simulations of radiation and scattering problems. Unfortunately, the new DGF expression involves binomial coefficients, whose computations may cause long runtimes and numerical problems. The proposed fast implementation of the DGF is based on the multiple precision arithmetic and employs a common programming language extended with the OpenMP parallel programming interface. As a result, the speedup factor of three orders of magnitude compared to the previous implementation was obtained, thus applicability of the DGF in FDTD simulations was significantly improved.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2012.2183632