Removing power line interference from ECG signal using adaptive filter and notch filter

Abstract

Performance of two adaptive filters, such as, normalized least-mean-square (NLMS) adaptive filter and recursive-least-square (RLS) adaptive filter are compared with a traditional notch filter both in time and frequency domains to remove the power line interference from the ECG signal. The power spectral density (PSD) and spectrogram analyses are also performed. Different performance parameters, such as, SNR, %PRD and MSE are also calculated. Real time recorded data from the benchmark MIT-BIH arrhythmia database has been used. The result demonstrates superior performance of adaptive NLMS filter for removing power line interference over adaptive RLS and notch filters.