PMID: 19947497Dec 2, 2009Paper

On the auto-reference, auto-correlation and adaptive interference cancellation theories and techniques for single extracting flash visual evoked potential

Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi
Zhifang WangZuchun Huang

Abstract

On the basis of analyzing the defects in traditional averaging theory for extracting evoked potential (EP), and by realizing the characteristic of spontaneous electroencephalo-signal (S-EES) as well as the special environment for extracting EP, we propose an auto-reference, auto-correlation, adaptive interference cancellation (AAA-ICT) for use in the single trial of flash visual evoked potential (FVEP). Firstly, the segment of reference signal, which has the best correlation with evoked electroencephalo-signal (E-EES), was obtained using the method for calculating the sliding correlation point by point between E-EES and reference signal; then, the cancellation factor between E-EES and the most correlative reference signal segment was derived by the least square method; at last, the single trial of FVEP was acquired by interference cancellation. By this method, FVEP can be extracted perfectly and the FVEP variability of individual inter-stimulation can be obtained.

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