Title
An averaging method for the Fourier approximation to discontinuous functions
Abstract
Both the truncated Fourier integral and the truncated Fourier series approximations for a discontinuous function bring about the inevitable oscillating error, say, the Gibbs phenomenon. Most basic filtering methods for the Gibbs phenomenon like the Fejer averaging method and the Lanczos averaging method have a disadvantage that the rise time is very slow even though the filtering effect is prominent away from the discontinuity. In this paper, we propose a new averaging method of polynomial type which improves the rise time of the existing method. The present method can be regarded as a generalization of the traditional Lanczos averaging method. By several numerical examples, we show the efficiency of the present method.
Year
DOI
Venue
2006
10.1016/j.amc.2006.05.060
Applied Mathematics and Computation
Keywords
Field
DocType
gibbs phenomenon,lanczos averaging method,present method,discontinuous function,new averaging method,fourier series,rise time,truncated fourier series approximation,existing method,fejer averaging method,traditional lanczos,fourier approximation,inevitable oscillating error,fourier integral,oscillations
Gibbs phenomenon,Mathematical optimization,Lanczos resampling,Polynomial,Mathematical analysis,Discontinuity (linguistics),Method of averaging,Fourier transform,Fourier series,Numerical analysis,Mathematics
Journal
Volume
Issue
ISSN
183
1
Applied Mathematics and Computation
Citations 
PageRank 
References 
0
0.34
2
Authors
3
Name
Order
Citations
PageRank
Beong In Yun18612.55
Hyun Chul Kim2655.82
Kyung Soo Rim321.73