ECG NOISE MODELLING IN TIME-FREQUENCY DOMAIN USING THE POLYNOMIAL EXTRAPOLATION

Abstract

Abstract: The paper presents a new ECG-dedicated noise removal technique. The proposed algorithm makes use of the local bandwidth variability of cardiac electrical representation. Background activities of any origin (muscle, mains interference etc.) are measured in specified regions of the time-frequency plane. Outside of these regions, where normally the cardiac representation components are expected, we use the square polynomial extrapolation to estimate the noise level. The partially measured and partially calculated time-frequency representation of the noise is arithmetically subtracted from the noisy signal and the inverse time-frequency transform yields noise-free cardiac representation. The algorithm was tested with use of the CSE Database records with the addition of the MIT-BIH Database noise patterns