NDLI: A comparison of performance of three orthogonal polynomials in extraction of wide-band response using early time and low frequency data

Content Provider	IEEE Xplore Digital Library
Author	Mengtao Yuan Jinhwan Koh Sarkar, T.K. Wonwoo Lee Salazar-Palma, M.
Copyright Year	1963
Abstract	The objective of this paper is to generate a wideband and temporal response of three-dimensional composite structures by using a hybrid method that involves generation of early time and low-frequency information. The data in these two separate time and frequency domains are mutually complementary and contain all the necessary information for a sufficient record length. Utilizing a set of orthogonal polynomials, the time domain signal (be it the electric or the magnetic currents or the near/far scattered electromagnetic field) could be expressed in an efficient way as well as the corresponding frequency domain responses. The available data is simultaneously extrapolated in both domains. Computational load for electromagnetic analysis in either domain, time or frequency, can be thus significantly reduced. Three orthogonal polynomial representations including Hermite polynomial, Laguerre function and Bessel function are used in this approach. However, the performance of this new method is sensitive to two important parameters-the scaling factor l/sub 1/ and the expansion order N. It is therefore important to find the optimal parameters to achieve the best performance. A comparison is presented to illustrate that for the classes of problems dealt with, the choice of the Laguerre polynomials has the best performance as illustrated by a typical scattering example from a dielectric hemisphere.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	785
Ending Page	792
Page Count	8
File Size	742790
File Format	PDF
ISSN	0018926X
Volume Number	53
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polynomials Data mining Wideband Time factors Frequency domain analysis Hybrid power systems Electromagnetic scattering Magnetic domains Magnetic separation Electromagnetic fields time and frequency domain Extrapolation marching on in time (MOT) method of moments (MoM) scaling factor
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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