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Analyzing pulmonary capillary pressure

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3 Author(s)
M. Karrakchou ; Signal Process. Lab., Swiss Federal Inst. of Technol., Lausanne, Switzerland ; C. van den Branden Lambrecht ; M. Kunt

A new mutual wavelet packets scheme is proposed for subband adaptive filtering. Its relation to the existing literature on the subject is outlined. The proposed scheme performs a decomposition of the two signals used in the adaptation process onto the same optimal basis. That basis is chosen so that it favors the adaptation performance. A new criterion, based on a functional of the two signals, is introduced. This proposed criterion consists in the maximization of the magnitude of the cross-correlation samples of the two signals considered. This maximizes the cross-correlation vector of the well known normal equations. At the expense of a slightly higher computational complexity, the mutual wavelet packets scheme reduces the aliasing drawback of regular subband adaptive filtering, preserving its main advantages. Simulations have been performed on pulmonary capillary pressure transients for respiratory interference cancelling. The method proved to be more efficient than classical methods

Published in:

IEEE Engineering in Medicine and Biology Magazine  (Volume:14 ,  Issue: 2 )