Paper Info
Title
Evolutionary spectral analysis using a warped Gabor expansion
Abstract
In this paper, we present a Gabor representation based on a nonrectangular tiling of the time-frequency plane and use it to improve the time and frequency resolutions of evolutionary spectra. In the traditional Gabor expansion, a signal is decomposed into a weighted combination of sinusoidally modulated windows resulting in a rectangular time-frequency plane tiling. Poor time and frequency localizations occur in the evolutionary spectrum when the corresponding signal is not modeled well by this fixed-window analysis. We are thus proposing the warped Gabor representation based on a linear chirp model for the signal. By means of a frequency transformation we are able to use the previous sinusoidal representation and choose the Gabor coefficients according to either a frequency masking or an energy concentration measure. Examples are given to illustrate our procedures
Year
DOI
Venue
1996
10.1109/ICASSP.1996.543923
ICASSP
Keywords
Field
DocType
frequency resolution,frequency localization,signal representation,warped gabor expansion,frequency masking,evolutionary spectral analysis,corresponding signal,gabor representation,spectral analysis,previous sinusoidal representation,evolutionary spectra,traditional gabor expansion,linear chirp model,frequency transformation,frequency masking measure,signal resolution,evolutionary spectrum,warped gabor representation,nonrectangular tiling,time-frequency plane,energy concentration measure,time-frequency analysis,time frequency,spectrum,time frequency analysis,signal processing,signal analysis
Frequency domain,Pattern recognition,Masking (art),Gabor expansion,Computer science,Spectral line,Time–frequency analysis,Artificial intelligence,Chirp,Spectral analysis,Gabor transform
Conference
Volume
ISSN
ISBN
3
1520-6149
0-7803-3192-3
Citations 
PageRank 
References 
5
0.58
5
Authors
2
Name
Order
Citations
PageRank
aydin akan116434.61
L. F. Chaparro24511.06