A NOISE-REDUCTION METHOD FOR ECG SIGNALS USING THE DYADIC WAVELET TRANSFORM

In this paper, we propose a new denoising algorithm based on the dyadi c wavelet transform (DWT) for ECG signals corrupted with different typ es of synthesized noise. Using the property that DWT is overcomplete, we define some convex sets in the set of wavelet coefficients and give an iterative method of the projection on the convex sets. The results show that the noises are not only removed from ECG signals, but also the ECG signals are reconstructed, which is used in detecting QRS comp lex. The performance of the proposed algorithm is demonstrated by some experiments in comparison with the conventional methods.