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		Xichun ZHANG,Gang WEI.[en_title][J].Control Theory and Technology,2006,4(3):281~285.[Copy]

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XichunZHANG,GangWEI
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Received:April 19, 2005Revised:May 31, 2006

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Theory and algorithms for two-dimensional warped discrete Fourier transform

Xichun ZHANG, Gang WEI

(School of Electronics & Information Engineering, South China University of Technology, Guangzhou Guangdong 510640, China)

Abstract:

In this paper, the two-dimensional Warped Discrete Fourier Transform(2-D WDFT) is developed based on the concept of the 1-D WDFT. An exact computation algorithm is developed for 2-D WDFT based on matrix factorizing with special structure. A fast algorithm is then proposed to reduce greatly the computational complexity of the inverse 2-D WDFT. Finally, numerical examples are given to show the efficiency of the proposed approach.

Key words: Discrete Fourier Transform Non-uniform DFT Warped DFT