脑电节律提取的小波变换方法

A Method for Extracting Basic Rhythms of EEG via Wavelet Analysis

脑电(EEG)信号是一种基本的人体生理信号,具有极其重要的临床和科研价值。为了提取脑电节律,提出一种基于小波变换的方法。这种方法使用Daubechies正交小波基,首先把EEG信号在其上进行多尺度分解,在某些尺度上对干扰信号进行消除,然后提取动态脑电节律。此方法不仅可以有效的消除脉冲干扰,而且能够很好地对脑电基本节律信号进行提取。

As basic electrophysiology signals of a human being, electroencephalogram （EEG） has been widely used in researches and clinics. The paper proposes a method for extracting rhythms of EEG, based on wavelet analysis. By using Daubechies mother wavelet, raw EEG is decomposed, and then we extract basic rhythms of EEG after interference is eliminated insome scales. This method not only eliminates interference well, but also extracts rhythms perfectly.