NDLI: An efficient recursive time-varying Fourier transform by using a half-sine wave window

Content Provider	IEEE Xplore Digital Library
Author	Weizhong Chen Griswold, N.C.
Copyright Year	1994
Description	Author affiliation: Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA (Weizhong Chen; Griswold, N.C.)
Abstract	The paper describes a new approach to the recursive time-varying Fourier transform (TVFT) or short-time Fourier transform (STFT), which corresponds to a half-sine wave moving window. The new recursive procedure is more efficient than that of the third-order real-pole window and requires about 41% of the computation required by a recursive Hamming or Hanning window. The half-sine wave window is finite, absolutely symmetric, and has negligibly small sidelobes in the frequency domain. It is shown that this half-sine wave window is better for real-time processing than a Hamming or a Hanning window due to its better utilization of signal energy. It is also indicated that the new recursive procedure operates equally well for adaptive estimation of average-based features such as lattice filter coefficients. In this case, by using the recursive half-sine wave window, only one real-multiplication operation is needed in one step of updating.
Starting Page	284
Ending Page	286
File Size	265903
Page Count	3
File Format	PDF
ISBN	0780321278
DOI	10.1109/TFSA.1994.467238
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-10-25
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fourier transforms Frequency domain analysis Adaptive estimation Adaptive filters Computational efficiency Signal processing Lattices Sampling methods
Content Type	Text
Resource Type	Article

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