Interpolated smoothed pseudo Wigner-Ville distribution for accurate spectrum analysis

Author

Andria, Gregorio ; Savino, Mario

Author_Institution

Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari, Italy

Volume

45

Issue

4

fYear

1996

fDate

8/1/1996 12:00:00 AM

Firstpage

818

Lastpage

823

Abstract

This paper deals with a new application of the time-domain windowed (smoothed version) of the pseudo Wigner-Ville distribution (PWD), that can be easily implemented in a dedicate digital instrument to be used as a spectral analyzer for time-frequency analysis of nonstationary signals. New computational algorithms are studied and developed to attain high time-frequency resolution, accuracy, flexibility and computational efficiency. Particularly, to reduce the negative effects due to leakage during frequency changes, a new interpolation formula is derived by using the windowing theory. The suggested technique allows the users to perform optimal evaluations of the instantaneous amplitudes and frequencies of analyzed signals

Keywords

Wigner distribution; interpolation; signal processing; spectral analysis; statistical analysis; accuracy; computational algorithms; computational efficiency; digital instrument; flexibility; frequency changes; instantaneous amplitudes; instantaneous frequencies; interpolation; leakage; negative effects; nonstationary signals; optimal evaluations; signal analysis; smoothed pseudo Wigner-Ville distribution; spectral analyzer; spectrum analysis; time-domain windowed distribution; time-frequency analysis; time-frequency resolution; windowing theory; Computational efficiency; Instruments; Interpolation; Performance analysis; Performance evaluation; Signal analysis; Signal resolution; Spectral analysis; Time domain analysis; Time frequency analysis;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.517002

Filename

517002