Title :
A beamformer for the acquisition of evoked potentials
Author :
McKinley, C.A. ; Parker, P.A.
Author_Institution :
New Brunswick Univ., Fredericton, NB, Canada
fDate :
4/1/1991 12:00:00 AM
Abstract :
Evoked potential (EP) measurements using a delay and sun beamformer acquisition system are described. This system has the potential for significantly improving the signal/noise ratio (SNR) in EP measurements. The performance of the beamformer is characterized in terms of the number of electrodes and cross-channel correlation. When compared to conventional ensemble averaging, the beamformer reduces the number of response repetitions required to achieve a given SNR by a factor which approaches the number of channels in the acquisition system.
Keywords :
bioelectric potentials; biomedical electronics; biomedical measurement; beamformer acquisition system; cross-channel correlation; electrodes; ensemble averaging; evoked potentials; Biomedical measurements; Delay; Electrodes; Finite impulse response filter; Noise generators; Phased arrays; Sensor arrays; Signal to noise ratio; Time measurement; Working environment noise; Electrodes; Evoked Potentials, Somatosensory; Fourier Analysis; Humans; Median Nerve; Signal Processing, Computer-Assisted;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
