Title :
Time-frequency distributions: a modification applied to the pseudo-Wigner-Ville distribution and the spectrogram
Author :
Moss, J.C. ; Adamopoulos, P.G. ; Hammond, J.K.
Author_Institution :
Southampton Univ., UK
Abstract :
The spectrogram and the Wigner-Ville distribution are reviewed as methods for time-frequency analysis of nonstationary signals. The modification to the spectrogram of K. Kodera et al. (see Phys. Earth Planetary Interiors, vol.12, p.142-150, 1976) is applied to the pseudo-Wigner-Ville distribution (PWD), and a comparison is made between the spectrogram and the PWD, with and without modification, using numerical examples. The optimum time-frequency analysis tool is shown to depend on the nature of the input signal. The modified spectrogram is seen to be a credible alternative to the PWD
Keywords :
signal processing; spectral analysis; PWD; analysis tool; input signal; nonstationary signals; pseudo-Wigner-Ville distribution; spectrogram; time-frequency analysis; Delay effects; Displays; Fourier transforms; Interference; Kernel; Signal analysis; Smoothing methods; Spectrogram; Time frequency analysis; Uncertainty;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100583
