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Power spectral estimation via nonlinear frequency warping

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2 Author(s)
Bell, D. ; Electronic Systems Division, Harris Corporation, Melbourne, FL ; Gowdy, J.

The technique of frequency warping for the estimation of power spectra of random signals with a nonlinear frequency scale is treated. The frequency spacing of the spectral estimates obtained via nonlinear frequency warping is compared to constant Q analysis. A procedure for reduction of the variance of the spectral estimators is described, a relationship is derived for this variance, and experimental verification is provided. Finally, example spectrograms are presented depicting applications of the technique.

Published in:

Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:26 ,  Issue: 5 )

Date of Publication:

Oct 1978

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