A class of highly concentrated time-frequency distributions based on the ambiguity domain representation and complex-lag moment

Authors:
Irena Orovic;Srdjan Stankovic
Affiliations:
Electrical Engineering Department, University of Montenegro, Podgorica, Montenegro;Electrical Engineering Department, University of Montenegro, Podgorica, Montenegro
Venue:
EURASIP Journal on Advances in Signal Processing
Year:
2009

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Abstract

A class of time-frequency distributions with complex-lag argument is proposed. It is based on the ambiguity domain representations of real and complex-lag moment, combined to provide a cross-terms free representation for multicomponent signals. Furthermore, the distributions from the proposed class provide a more effective instantaneous frequency estimation for signals with fast varying phase function than the existing approach. The theory is illustrated by the examples.