Experimental results of stable time-varying multi-notch filter

Abstract

This paper presents experimental results of a stable time-varying IIR narrow multi-band-stop filter. The design and stability check procedures have been shown. The experimental hardware used to conduct the measurement of the ECG was presented. The concept of the time-varying coefficients was used in order to reduce the transient time of the filtering structure. The advantages of the proposed methodology were confirmed with three test cases focused on denoising the input signal.