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Generalized ShortTime Fourier Transforms Based on Nonuniform Filter Bank Structure
Shigeo WADA
Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Vol.E78A
No.3
pp.431436 Publication Date: 1995/03/25 Online ISSN:
DOI: Print ISSN: 09168508 Type of Manuscript: LETTER Category: Digital Signal Processing Keyword: shorttime Fourier transform, nonuniform filter bank, finite window function,
Full Text: PDF>>
Summary:
The discretetime shorttime Fourier transform (STFT) is known as a useful tool for analyzing and synthesizing signals. This paper introduces an extention of the wellknown STFT to a general form which is more suitable for high resolutional signal analysis. A channel frequency division scheme is developed for realizing arbitrary bandwidth and center frequency so as to improve resolution performance. It is based on a nonuniform filter bank structure with integer decimation and interpolation factors. A design example of the generalized STFT using symmetric windows is given.

