ECG DENOISING USING THE WAVELETS AND ROBUST ANALYSIS OF ECG SIGNALS

Abstract

The project aims at the successful development of an algorithm to rapidly and efficiently denoising the ECG waveforms . In general, ECG signals affected by noises such as baseline wandering,power line interference, electromagnetic interference, and high frequency noises during data acquisition. In order to retain the ECG signal morphology, several researches have adopted using different preprocessing methods. I have considered the Discrete Wavelet Transform (DWT) based wavelet denoising have incorporated using different thresholding techniques to remove three major sources of noises from the acquired ECG signals namely, power line interference, baseline wandering, and high frequency noises. seven wavelet functions ("db1","coif1","rbio1.1","dmey","bior1.1","haar" and "sym1") and four different thresholding levels are used to de-noise the noise in ECG signals.The proposed algorithm in this thsis can be used for accurate and fast feature extraction from any ECG signal and for further classification into normal and abnormal signal. Our work basically includes three phases namely de-noising of the input signal, detection of peaks and finally detecting the abnormality if any present.