DocumentCode :
3862091
Title :
Time-frequency distributions with complex argument
Author :
L. Stankovic
Author_Institution :
Elektrotehnicki fakultet, Univ. of Montenegro, Yugoslavia
Volume :
50
Issue :
3
fYear :
2002
Firstpage :
475
Lastpage :
486
Abstract :
A distribution highly concentrated along the group delay or the instantaneous frequency (IF) is presented. It has been defined by introducing a signal with a complex argument in time-frequency (TF) analysis. Realization of a signal with a complex argument, using a signal with a real argument, is described. The reduced interference realization of the complex argument distribution, in the case of multicomponent signals, is presented. The proposed distribution is used for the IF estimation. It is shown that the estimation can be improved with respect to the Wigner distribution based one since the bias can be significantly reduced with only a slight increase of the variance. The theory is illustrated by examples.
Keywords :
"Time frequency analysis","Signal analysis","Delay","Fourier transforms","Interference","Spectral analysis","Noise reduction","Spectrogram","Quantum mechanics","Multidimensional systems"
Journal_Title :
IEEE Transactions on Signal Processing
Publisher :
ieee
ISSN :
1053-587X
Type :
jour
DOI :
10.1109/78.984717
Filename :
984717
Link To Document :
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