𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A METHOD TO MINIMISE THE CROSS-TALK OF THE WIGNER–VILLE DISTRIBUTION

✍ Scribed by Y.-K. Park; Y.-H. Kim

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
346 KB
Volume
11
Category
Article
ISSN
0888-3270

No coin nor oath required. For personal study only.

✦ Synopsis

There have been many applications of the Wigner-Ville distribution to various mechanical signatures. However, since most mechanical signatures have multiple components, the distribution is confused by cross-talk between these components. This paper addresses a way in which one might distinguish cross-talk and signals which contain useful information. This can be done by utilising the ambiguity function which describes the signal in terms of time delay and frequency delay. The true signal components tend to be located around the centre of the time delay and frequency delay axes and cross-talk components are away from the origin of the ambiguity function. Based on this observation, a two-dimensional 'rotating window' is proposed that can eliminate cross-talk. Theoretical derivations and numerical simulations are also included to illustrate this method.

📜 SIMILAR VOLUMES

Time-frequency analysis of a non-uniform
Time-frequency analysis of a non-uniformly sampled signal with the Wigner–Ville transform: application to the study of the gyroscopic motion of a projectile
✍ L. Simon; J.C. Valiere; C. Depollier 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 497 KB

The aim of this paper is to determine the instantaneous components of a high-speed spinning moving body by means of the pseudo discrete Wigner-Ville distribution (PDWVD). The data access generates an enslaved sampling and, due to the friction forces, the sampling is non-uniform. With respect to suff