Deterioration of average evoked potential waveform due to asynchronous averaging and its compensation

Author

Nakamura, Masatoshi ; Nishida, Shigeto ; Shibasaki, Hiroshi

Author_Institution

Dept. of Electr. Eng., Saga Univ., Japan

Volume

38

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

309

Lastpage

312

Abstract

The deterioration of the average due to the asynchronous sampling of evoked potential data is discussed. The asynchronous averaging in the frequency domain is analyzed, and a relationship between the fluctuating time and the degree of the deterioration is derived. By using this relationship, a required sampling rate is derived to ensure the accuracy of the averaging. In the case of coarse sampling, a compensation procedure for the asynchronous averaging is deduced, by which the compensated signal approaches the original signal as the number of averagings increases.

Keywords

bioelectric potentials; signal processing; asynchronous averaging; average evoked potential waveform; coarse sampling; compensated signal; fluctuating time; sampling rate; waveform deterioration; Biomedical measurements; Distortion measurement; Electric variables measurement; Electromyography; Frequency estimation; Noise measurement; Pollution measurement; Sampling methods; Signal to noise ratio; Silicon compounds; Evoked Potentials; Signal Processing, Computer-Assisted;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.133216

Filename

133216