On the auto-reference, auto-correlation and adaptive interference cancellation theories and techniques for single extracting flash visual evoked potential.
- Author:
Zhifang WANG
1
;
Zhengxiang XIE
;
Xuefei ZHONG
;
Ying WANG
;
Hong LI
;
Yuhong LIU
;
Juan YANG
;
Jing ZHANG
;
Zuchun HUANG
Author Information
1. Chongqing Medical Instrument Quality Inspection Center, Chongqing 401121, China.
- Publication Type:Journal Article
- MeSH:
Algorithms;
Electroencephalography;
methods;
Evoked Potentials, Visual;
physiology;
Humans;
Signal Processing, Computer-Assisted
- From:
Journal of Biomedical Engineering
2009;26(5):1094-1100
- CountryChina
- Language:Chinese
-
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.
