Recursive time-frequency methods for dynamic systems

Conventional methods using the time or frequency domain individually have limitations in many applications. The present study investigates methods of analysing the two domains jointly and applies this in system modelling. Time frequency distributions are investigated considering applications in time variant environments. A method has been developed using recursive filters in bands, providing easy to interpret information about time localisation of spectral events. Stationary and nonstationary cases can be represented. Processing in the joint domains enables detailed modifications of the original signal.<>