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A multi-window fractional evolutionary spectral analysis

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2 Author(s)
Cekic, Y. ; Dept. of Electr. Eng., Univ. of Bahcesehir, Istanbul, Turkey ; Akan, A.

In this work, we present a multiple window evolutionary spectral analysis on a non-rectangular time-frequency lattice based on a discrete fractional Gabor expansion. The traditional Gabor expansion uses a fixed, and rectangular time-frequency plane tiling. Many of the practical signals such as speech, music, etc., require a more flexible, nonrectangular time-frequency lattice for a compact representation. The proposed method uses a set of basis functions that are related to the fractional Fourier basis and generates a parallelogram-shaped tiling. Simulation results are given to illustrate the performance of our algorithm.

Published in:

Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on  (Volume:6 )

Date of Conference:

6-10 April 2003