摘要
在心电信号的采集过程中，不可避免地会混入肌电噪声和各种干扰信号，为了获得含有较小噪声的ＥＣＧ信号，便于分析，需要对采集到的ＥＣＧ信号作消噪处理。目前对心电信号滤波器的设计有多种方法，自适应滤波器就是其中的一种。在自适应滤波器的实现过程中，需要一个与噪声信号相关而与原始信号无关的参考信号，这一参考信号很难从体表直接采到。本文介绍一种基于自适应的新的滤波技术，通过预测滤波器将原始信号中的信号与噪声分离从而由原始信号中直接获得参考信号，我们用它处理心电信号及背景噪声，可将噪声抑制１２ｄＢ以上。
In the processing of getting the ECG signals,we can not get rid of noise.In order to get ECG signal with less noise,and easy to analyse ECG signals.We should remove noise from the ECG signals obtained.At present,there are many mathods to design the ECG filter,and the adaptive filter is one of them.In the implementation of adaptive filter,we need a reference signal that is independant with the original signals,but is not related to getting the reference singnal directly from a part of the body is difficult.In this paper,we suggest a new method based on adaptive filter.The reference signal can be obtained directly from the original signal by separating the noise and signal by using a prediction filter.We used it to process the ECG signals and background noise when the noise was depressed by more than 12dB.
出处
《北京生物医学工程》
1999年第1期10-13,共4页
Beijing Biomedical Engineering
