基于小波变换的心电信号处理

摘要

针对心电信号极易受到外界噪声干扰，数据量大的问题，提出了将小波变换分析运用于心电信号处理的方法。小波变换（wavelet transform，WT）作为一种新的变换分析方法，广泛应用于图象和信号处理，结合小波变换对于低频信号处理的优势，采用小波变换的理论，对采集到的心电信号进行处理。处理方面分为不同小波基的小波分解，不同小波基各层次的去噪，心电压缩等。在 MATLAB 软件上进行仿真，结果表明，小波变换在心电信号处理上效果良好，具有一定的研究与应用价值。%Aiming at the problems of noise outside and large amount of data,the method,using the wavelet transform (briefly called WT)for ECG,is proposed in this paper.WT,as a new transform anal-ysis method,is widely used in image and signal processing.ECG signal is typically a weak non -stationary signal and the energy is concentrated in the low frequency band.With the advantages of the low -frequency wavelet transform signal processing,the processing of the collected ECG signal is conduc-ted by means of the theory of wavelet transform,which includes wavelet decomposition,different levels of wavelet denoising and ECG compression,The simulation in MATLAB software shows that the wavelet transform has good effect in signal processing and a certain value for research and application.