Improving adaptive tracking in time-frequency plane using varying number of adaptive notch filters

Authors:
Hieu Thai;Minh Ta;Victor DeBrunner
Affiliations:
FAMU, College of Engineering, Florida State University;FAMU, College of Engineering, Florida State University;FAMU, College of Engineering, Florida State University
Venue:
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Year:
2009

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Abstract

Previous work [1] uses Adaptive Notch Filters (ANF) to track time-varying signals in time-frequeney plane with a fixed number of ANFs. However, if too few ANFs are used, some important components may be missed. On the other hand, if too many ANFs are used, noise is also tracked and some artifacts may be introduced. This paper summary proposes an approach to estimate a number of ANFs in order to track a specific time-varying signal.