Adaptive Window Width Selection Algorithm for Gabor Transform Based on Entropy

Du  Xiu-Li; Shen  Yi; Wang Yan

doi:10.3724/SP.J.1146.2007.00534

Volume 30 Issue 10

Jan. 2011

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Du Xiu-Li, Shen Yi, Wang Yan. Adaptive Window Width Selection Algorithm for Gabor Transform Based on Entropy[J]. Journal of Electronics & Information Technology, 2008, 30(10): 2291-2294. doi: 10.3724/SP.J.1146.2007.00534

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Du Xiu-Li, Shen Yi, Wang Yan. Adaptive Window Width Selection Algorithm for Gabor Transform Based on Entropy[J]. Journal of Electronics & Information Technology, 2008, 30(10): 2291-2294. doi: 10.3724/SP.J.1146.2007.00534

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Adaptive Window Width Selection Algorithm for Gabor Transform Based on Entropy

doi: 10.3724/SP.J.1146.2007.00534

Du Xiu-Li^{①②沈毅
,},
Shen Yi,
Wang Yan

Received Date: 2007-04-09
Rev Recd Date: 2007-11-23
Publish Date: 2008-10-19

Abstract

Abstract

To resolve the issue of window width selection, an adaptive algorithm for Gabor transform is proposed, which improves the concentration and time-frequency resolution of Gabor representation. The value range of Shannon entropy is mended to make it more adequate for measuring concentration of time-frequency distribution. Moreover, basing on entropy, an optimal window width can be searched adaptively. Simulation results show that the proposed algorithm chooses the optimal window width for mono-component signal or multi-component signal, giving the best Gabor representation with high concentration and time-frequency resolution. Additionally, the algorithm behaves well under low signal noise ratio.
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References

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