Title :
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
fDate :
3/1/1991 12:00:00 AM
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;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
