De-noising of ECG Signal Based on Stationary Wavelet Transform
Gao Qing · Dianzi xuebao · 2003
The artifacts of wavelet spatial adaptation de noising method is discussed,and the stationary wavelet transform is proposed.Harr wavelet is selected to decompose the noisy ECG signal for several levels.The noise mean square σ j is estimated by the stationary wavelet transform details at every level.The detail d j goes toward 0 by threshold σ j 2ln n ,where n is length of the detail.The recovery signal is reconstructed and experimental result shows this de noising method suppress Gibbs phenomena and reserves geometrical character of ECG signal.