標題: Applicability of phase-locked loop to tracking the rhythmic activity in EEGS
作者: Lo, PC
Lee, YY
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: EEG rhythmic bands;PLL;SSB modulation;meditation EEG
公開日期: 2000
摘要: Conventional methods of spectral analysis are based on mathematical or numerical algorithms applied to digitized signals. This paper discusses the applicability of the phase-locked loop (PLL) approach for tracking electroencephalogram (EEG) rhythmic bands (delta, theta, alpha, or beta). The use of the PLL for frequency tracking should also aid the development of online EEG interpretation and screening based on frequency characteristics when the PLL is realized by hardware. As a result, two factors in the applicability of the PLL are: (1) translation of the EEG spectrum to a higher-frequency band by a single-sideband (SSB) modulation scheme, and (2) the narrowband spectral feature of the EEG-a small difference between two major frequencies. The PLL output is further quantized according to the EEG rhythmic bands. Our analysis shows that the integrated system is capable of tracking the EEG rhythmic patterns.
URI: http://hdl.handle.net/11536/30889
ISSN: 0278-081X
期刊: CIRCUITS SYSTEMS AND SIGNAL PROCESSING
Volume: 19
Issue: 3
起始頁: 171
結束頁: 186
顯示於類別:期刊論文


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