COHERENT AVERAGING TECHNIQUE - A TUTORIAL REVIEW .1. NOISE-REDUCTION AND THE EQUIVALENT FILTER

被引：102

作者：

ROMPELMAN, O

ROS, HH

机构：

[1] Information Theory Group, Department of Electrical Engineering, Delft University of Technology, Delft, Netherlands

来源：

JOURNAL OF BIOMEDICAL ENGINEERING | 1986年 / 8卷 / 01期

关键词：

NOISE; SPURIOUS SIGNAL - Attenuation - SIGNAL PROCESSING - Applications - STATISTICAL METHODS - Applications;

D O I：

10.1016/0141-5425(86)90026-9

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Coherent averaging is used to recover the response to repetitively applied stimuli when that response is embedded in random noise, and when the signal/noise ratio is fractional. As an example we refer to the evoked responses (ER) in the EEG. In this paper the improvement in s/n ratio due to averaging is calculated; it is also shown that averaging acts as a filter which attenuates periodic interference when it is not time-locked to the stimulus; the characteristics of this filter are derived.

引用

页码：24 / 29

页数：6