Region-Based Wavelet-Packet Adaptive Algorithm for Sparse Response Identification

Authors:
Odair A. Noskoski;José C. Bermudez
Affiliations:
Department of Electrical Engineering, Federal University of Santa Catarina,;Department of Electrical Engineering, Federal University of Santa Catarina,
Venue:
ICISP '08 Proceedings of the 3rd international conference on Image and Signal Processing
Year:
2008

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Abstract

This paper proposes a new wavelet-packet-based algorithm for sparse response identification. The distinctive features of the new algorithm are a region-based strategy for adaptive weight activation and a new deactivation/activation schedule across the transform scales. The new algorithm shows improved performance when compared to existing wavelet-based algorithms with similar characteristics. The new strategies lead to a faster wavelet-packet transform construction and to improved robustness to design parameters when compared to previous solutions. Monte Carlo simulation results show good performances regarding convergence speed and robustness to design parameter choice.