Optimal selection of wavelet basis function applied to ECG signal denoising

Authors:
Brij N. Singh;Arvind K. Tiwari
Affiliations:
Department of Electrical Engineering and Computer Science, Tulane University, New Orleans, LA 70118, USA;Department of Electrical Engineering, Institute of Technology, Banaras Hindu University, Varanasi 221005, India
Venue:
Digital Signal Processing
Year:
2006

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Abstract

Over the years ElectroCardioGram (ECG) signal has been used to assess the cardiovascular condition of humans. In practice, real time acquisition and transmission of the ECG may contain noise signals superimposed on it. In general, the signal processing algorithms employed for denoising provide optimal performance and eliminate the high frequency noise between any two beats contained in a continuous ECG signal. Despite their optimal performance, the signal processing algorithms significantly attenuate the peaks of characteristics wave of the ECG signal. This paper presents a selection procedure of mother wavelet basis functions applied for denoising of the ECG signal in wavelet domain while retaining the signal peaks close to their full amplitude. The obtained wavelet based denoised ECG signals retain the necessary diagnostics information contained in the original ECG signal.