THE ANALYSIS OF NONSTATIONARY SIGNALS USING TIME-FREQUENCY METHODS

This paper deals with the time-frequency analysis of deterministic and stochastic non-stationary signals. It includes the following: a brief review of the fundamentals of time-frequency analysis and various tim e-frequency distributions; a summary of the inter-relations between ti me-frequency distributions, emphasizing links between evolutionary spe ctra, the Wigner-Ville distribution, and Cohen-class distributions; de monstration of the effects of using different analysis methods on samp le time histories; the analytical modelling of physical phenomena so a s to predict theoretical time-frequency distributions, with a view to offering insight into the signal generation mechanisms. (C) 1996 Acade mic Press Limited