Title :
What are the joint time-frequency moments of a signal?
Author :
Tacer, Berkant ; Loughlin, Patrick J.
Author_Institution :
Dept. of Electr. Eng., Pittsburgh Univ., PA, USA
Abstract :
We investigate the question of what the joint moments of a signal are by considering the joint moments of the spectrogram for limiting cases of the window. Operator methods are also explored. Expressions for the joint moments are derived, which reveal the distorting effects of the spectrogram window. Knowledge of the joint moments of a signal may be useful in estimating positive time-frequency distributions, or in signal classification of nonstationary signals
Keywords :
frequency estimation; signal processing; spectral analysis; time-frequency analysis; distorting effects; joint time-frequency moments; limiting window cases; nonstationary signals; positive time-frequency distributions; signal classification; spectrogram; spectrogram window; time-frequency estimation; Chirp; Equations; Frequency domain analysis; Kernel; Pattern classification; Spectrogram; Time frequency analysis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.543929
