小波变换在ECG信号滤波中的应用研究

The application of ECG Signal Filter Based on Wavelet Transformation

本文首先介绍了小波变换应用于ECG信号消噪处理中的几种常用滤波方法的原理,分析了它们的滤波性能。然后提出一种小波变换与自适应滤波相结合的心电信号去噪方法,实验证明这种去噪方法可以有效抑制心电信号中的噪声干扰,保持信号的波形特征,是对"运用多分辨率分析方法,去除噪声干扰对应小波分解尺度上细节分量"的滤波方法的一种有效改进,达到较好的滤波效果。

In this paper we introduces several algorithms of ECG signal filter based on wavelet transformation and analyses their capabilities of filtering. Then we designs a new method based on wavelet transformation and adaptive filter. The experimental results demonslrate that the noises of ECG signal are successfully removed and the useful ECG information is perfectly preserved. It is an efficient modification of the method denoising in the way of removing the detail components of noises in multi-scale analysis and has belter capability of filtering.