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A concept of time-varying FIR notch filter based on IIR filter prototype

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2 Author(s)
Sławomir Kocoń ; Faculty of Electrical Engineering, West Pomeranian University of Technology, Szczecin ; Jacek Piskorowski

In this paper a concept of time-varying finite impulse response narrow band-stop (notch) filter with improved dynamic behaviour, based on infinite impulse response filter prototype, is proposed. In order to reduce the amplitude of the transient response of the proposed FIR notch filter the pole radius of the IIR filter prototype is temporarily varied in time. Optimization algorithm for finding the parameters for the function of the pole radius is presented. The proposed filters are tested using sinusoid, rectangle, and ECG signals. Computer simulations demonstrate that the proposed time-varying FIR filters outperform traditional time-invariant FIR filters.

Published in:

Methods and Models in Automation and Robotics (MMAR), 2012 17th International Conference on

Date of Conference:

27-30 Aug. 2012