Robust time-frequency distributions with complex-lag argument

Authors:
Nikola Żarić;Irena Orović;Srdjan Stanković
Affiliations:
Faculty of Electrical Engineering, University of Montenegro, Podgorica, Montenegro;Faculty of Electrical Engineering, University of Montenegro, Podgorica, Montenegro;Faculty of Electrical Engineering, University of Montenegro, Podgorica, Montenegro
Venue:
EURASIP Journal on Advances in Signal Processing - Special issue on robust processing of nonstationary signals
Year:
2010

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Abstract

The robust time-frequency distributions with complex-lag argument are proposed. They can provide an accurate estimation of fast varying instantaneous frequency in the presence of noise with heavy-tailed probability density function. The L-estimate form of this distribution is defined and it includes the L-estimate form of Wigner distribution as a special case. A modification for multicomponent signal representation is proposed, as well. Theoretical considerations are illustrated by the examples.