Title :
Signal characterization using generalized “Time-phase derivatives” representation
Author :
Gottin, Bertrand ; Orovic, Irena ; Ioana, Cornel ; Stankovic, Srdjan ; Chanussot, Jocelyn
Author_Institution :
GIPSA-Lab., Domaine Univ., Grenoble
Abstract :
Natural signals are often characterized by a complex time-frequency behaviour. These signals exist in many different applications and systems from underwater acoustic to audio signals with sound attacks or electrical systems with partial discharges and commutation switches, for example. There is a huge number of time-frequency (TF) methods that aim to characterize these signals in terms of first phase derivative analysis (i.e instantaneous frequency law). Recently, we introduced the time frequency distribution based on complex lag arguments. This distribution is able to reduce inner interferences terms which appear when studying non-linear TF components. It also offers access to an instantaneous law representation of any phase derivative order. In this paper, we use these two properties to study highly non-stationary signals as well as transient signals.
Keywords :
signal representation; time-frequency analysis; complex lag arguments; first phase derivative analysis; generalized time-phase derivatives representation; signal characterization; time frequency distribution; Indium phosphide; Information analysis; Interference; MONOS devices; Partial discharges; Polynomials; Signal analysis; Signal processing; Time frequency analysis; Underwater acoustics; “Time-phase derivatives” representation; complex arguments; phase analysis;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-2353-8
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2009.4960255