摘要
本文研究了去除诱发电位中50赫工频干扰的一种新途径。用自相关方法测出干扰成份的两个正交分量,从而得出干扰成份的幅度,相位和频率三个参数值,在诱发电位中减去该参数确定的正弦信号,便消除了干扰。本方法的特点是在刺激前的数据中估计干扰成份参数,因此减少了诱发电位本身对估计精度的影响。本文将给出对模拟受干扰和实际受干扰的脑干诱发电位进行处理的结果。
<ABSTRACT>
A new approach for cancelling 50Hz-interferance from evoked poten-
tial records is described. The cancelling is done by substracting an esti-
mated sinusoidal interferance waveform from the records. The amplitu-
de, frequency and phase of the interferance waveform are evaluated
from the records immediately before stimulation. The results from sim-
ulated and actually contaminated brainstem auditory evoked potential
records show that the method is quite efficient and leads to no signal
distortion.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
1992年第1期36-42,共7页
Chinese Journal of Biomedical Engineering
基金
上海市电子计算机
和大规模集成电路工作小组支持的研究项目
