Recovery of Emg Signals from the Mixture of Ecg-emg Signals Using Non- Stationary Harmonic Modeling

1,3 Electronics and Communication Engineering, Swami Keshwanand Institute of Technology, Jaipur,(India) 2 Electronics and Communication Engineering, Sri Balaji College of Engineering & Technology, Jaipur,(India) ABSTRACT An approach for removal of the presence of ECG in electromyographic signals by means of time-variant harmonic modeling of the cardiac artifact. The amplitude and frequency time variations in heart rate and QRS complex variability of the electrocardiograms are simultaneously captured by a set of third-order constantcoefficient polynomials modulating a stationary harmonic basis in the analysis window. Such a characterization allows us to significantly suppress ECG signal component from the mixture by preserving most of the EMG signal content at low frequencies (less than 20 Hz). Moreover, the resulting model is linear in parameters and the least-squares solution to the corresponding linear system of equations efficiently provides model parameter estimates. The result suggests that the proposed method outperforms in terms of the EMG preservation at low frequencies.