Whitening of Background Brain Activity via Parametric Modeling
Author(s) -
Nidal Kamel,
Andrews Samraj,
Arash Mousavi
Publication year - 2007
Publication title -
discrete dynamics in nature and society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.264
H-Index - 39
eISSN - 1607-887X
pISSN - 1026-0226
DOI - 10.1155/2007/48720
Subject(s) - colors of noise , colored , noise (video) , computer science , parametric statistics , white noise , parametric model , signal (programming language) , subspace topology , electroencephalography , pattern recognition (psychology) , algorithm , speech recognition , mathematics , artificial intelligence , statistics , image (mathematics) , psychology , telecommunications , materials science , psychiatry , composite material , programming language
Several signal subspace techniques have been recently suggested for the extraction of the visual evoked potential signals from brain background colored noise. The majority of these techniques assume the background noise as white, and for colored noise, it is suggested to be whitened, without further elaboration on how this might be done. In this paper, we investigate the whitening capabilities of two parametric techniques: a direct one based on Levinson solution of Yule-Walker equations, called AR Yule-Walker, and an indirect one based on the least-squares solution of forward-backward linear prediction (FBLP) equations, called AR-FBLP. The whitening effect of the two algorithms is investigated with real background electroencephalogram (EEG) colored noise and compared in time and frequency domains
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