Modeling and suppressing the electrocardiogram noise  in the time-frequency domain modelling the electrocardiogram noise uses the information about the local bandwidth of the cardiac signal and the current wave borders, that maximizes the number of noise measurement points,  in the regions containing the cardiac representation, where the direct measurement cannot be performed, we use the extrapolation in the time domain and in the frequency domain independently,  the computed coefficients of quasi-continuous model of the noise are subtracted from the raw signal, what reduces the contribution of the noise. [26],[52]