Resumen de Publicaciones

Wavelet

general

1994

Multiresolution transient detection

Abry, P.; Flandrin, P.

Time-Frequency and Time-Scale Analysis, 1994., Proceedings of the IEEE-SP

International Symposium on , 1994

Page(s): 225 -228

Abstract :

Designs and studies the performance of a multiresolution-based transient detector. The

transients the authors are interested in consist of wide-band, pulse-like, coherent

structures in a turbulent flow. To take advantage of the fast pyramidal wavelet algorithm,

an important point when processing large amounts of experimental data, the detector

makes use of the discrete wavelet transform. The authors show how the lack of

time-invariance drawback of the discrete transform can be efficiently overcome by using

relevant analytic wavelets. They thus compare this detection technique with one based on

a continuous wavelet transform, as well as with other standard methods and show that

wavelets perform best when the transients are superimposed on a colored 1/f background

noise. This description is very close to that of turbulence and relevant also in many other

situations.

1996

A fuzzy-logic-based threshold function for signal recovery using discrete wavelet

transform

Wenbo Mei; Lik-Kwan Shark

Signal Processing, 1996., 3rd International Conference on , Volume: 1 , 1996

Page(s): 283 -286 vol.1

Abstract :

In this paper, a novel threshold function based on fuzzy logic is proposed to achieve good

signal recovery performance in the presence of noise using the discrete wavelet

transform. The proposed threshold is shown to provide an alternative and flexible

approach to solve the problems associated with the conventional hard-threshold approach.

Some typical results, obtained from the computer simulations of recovering a transient

signal embedded in additive white Gaussian noise in different signal-to-noise ratio settings,

are presented to demonstrate the potential and the effectiveness of the proposed

threshold function.

2000