TY - CHAP

T1 - Adaptive Notch Filter in Wavelet Packet Trees

AU - Mercorelli, Paolo

AU - Rode, Manfred

AU - Terwiesch, Peter

N1 - Conference code: 45

PY - 2000

Y1 - 2000

N2 - Second order notch lters are commonly used for frequency estimation purposes. They are characterized by a single design parameter, the value of which is selected to achieve a suitable compromise between tracking performance and bias/variance errors. We study the problem of estimating the dominant frequency of a non stationary Gaussian series by using notch lters. The design parameter is performed using wavelet tool, the technique thresholds the empirical wavelet coecients in order to estimate the bandwidth. The classical Recursive Least Square Algorithm runs on the wavelet packet tree choosing the more sensitive time frequency level. We propose an empirical on-line algorithm using wavelet packets for detection of pantograph vibration in rail vehicle.

AB - Second order notch lters are commonly used for frequency estimation purposes. They are characterized by a single design parameter, the value of which is selected to achieve a suitable compromise between tracking performance and bias/variance errors. We study the problem of estimating the dominant frequency of a non stationary Gaussian series by using notch lters. The design parameter is performed using wavelet tool, the technique thresholds the empirical wavelet coecients in order to estimate the bandwidth. The classical Recursive Least Square Algorithm runs on the wavelet packet tree choosing the more sensitive time frequency level. We propose an empirical on-line algorithm using wavelet packets for detection of pantograph vibration in rail vehicle.

KW - Engineering

M3 - Article in conference proceedings

T3 - Internationales wissenschaftliches Kolloquium

SP - 73

EP - 78

BT - 45. Internationales Wissenschaftliches Kolloquium

PB - TU Ilmenau

CY - Ilmenau

T2 - 45th Ilmenau Scientific Colloquium - 2000

Y2 - 4 October 2000 through 6 October 2000

ER -