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Amplitude and Phase Analysis of EEG Signal by Complex Demodulation

Authors
 Sun K. Yoo  ;  Hee Cheol Kang 
Citation
 World Academy of Science, Engineering and Technology, Vol.7(10) : 648-651, 2013-10 
Journal Title
 World Academy of Science, Engineering and Technology 
ISSN
 2010-376X 
Issue Date
2013-10
Keywords
EEG ; Complex Demodulation ; Amplitude ; Phase
Abstract
Analysis of amplitude and phase characteristics for delta, theta, and alpha bands at localized time instant from EEG signals is important for the characterizing information processing in the brain. In this paper, complex demodulation method was used to analyze EEG (Electroencephalographic) signal, particularly for auditory evoked potential response signal, with sufficient time resolution and designated frequency bandwidth resolution required. The complex demodulation decomposes raw EEG signal into 3 designated delta, theta, and alpha bands with complex EEG signal representation at sampled time instant, which can enable the extraction of amplitude envelope and phase information. Throughout simulated test data, and real EEG signal acquired during auditory attention task, it can extract the phase offset, phase and frequency changing instant and decomposed amplitude envelope for delta, theta, and alpha bands. The complex demodulation technique can be efficiently used in brain signal analysis in case of phase, and amplitude information required.
Files in This Item:
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Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Family Medicine (가정의학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Medical Engineering (의학공학교실) > 1. Journal Papers
Yonsei Authors
Kang, Hee Cheol(강희철) ORCID logo https://orcid.org/0000-0002-0309-7448
Yoo, Sun Kook(유선국) ORCID logo https://orcid.org/0000-0002-6032-4686
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/178523
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