Redundant wavelet processing on the half-axis with applications to signal denoising with small delays: Theory and experimentsReportar como inadecuado




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1 CAS - Centre Automatique et Systèmes 2 GA TECH - Daniel Guggenheim School of Aerospace Engineering

Abstract : A wavelet transform on the negative half real axis is developed using an average-interpolation scheme. This transform is redundant and can be used to perform causal wavelet processing, such as on-line signal denoising, without delay. Nonetheless, in practice some boundary effects occur and thus a small amount of delay is required to reduce them. The effect of this delay is studied using a numerical example of a signal with large noise and sharp transients. It is shown that the delay required to obtain acceptable denoising levels is decreased by using the proposed redundant transform instead of a non-redundant one. We also present results from the experimental implementation of the proposed algorithm for the denoising of a feedback signal during the control of a three-phase permanent-magnet synchronous brushless DC motor.





Autor: François Chaplais - Panagiotis Tsiotras - Dongwon Jung -

Fuente: https://hal.archives-ouvertes.fr/



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