Parallel frequency tracking with built-in performance evaluation

Authors:
Michał Meller;Maciej Niedwiecki
Affiliations:
Department of Automatic Control, Gdańsk University of Technology, Faculty of Electronics, Telecommunications and Computer Science, Narutowicza 11/12, 80-233 Gdańsk, Poland;Department of Automatic Control, Gdańsk University of Technology, Faculty of Electronics, Telecommunications and Computer Science, Narutowicza 11/12, 80-233 Gdańsk, Poland
Venue:
Digital Signal Processing
Year:
2013

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Abstract

The problem of estimation of instantaneous frequency of a nonstationary complex sinusoid (cisoid) buried in wideband noise is considered. The proposed approach employs a bank of adaptive notch filters, extended with a nontrivial performance assessment mechanism which automatically chooses the best performing filter in the bank. Additionally, a computationally attractive method of implementing the bank is proposed. The new structure allows one to improve tracking results considerably, especially in nonstationary conditions. In terms of accuracy of frequency estimates, the proposed scheme outperforms existing ones considerably.