Reduction of Gibbs Overshoot in Continuous Wavelet Transform (Special Section on Digital Signal Processing)
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概要
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In this paper we propose two methods, named the time smoothing and the scale smoothing respectively, to reduce the Gibbs overshoot in continuous wavelet transform. It is shown that for a large kind of wavelets the scale smoothing cannot remove the Gibbs overshoot completely as in the case of Fourier analysis, but it is possible to reduce the overshoot for any wavelets by choosing the smoothing window functions properly. The frequency behavior of scale smoothing is similar to that of the time smoothing. According to its frequency behavior we give the empirical conditions for selecting the smoothing window functions. Numerical examples are given for illustrations.
- 社団法人電子情報通信学会の論文
- 1997-08-25
著者
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Kawai Yasuhiro
Toyota Corp.
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Maeda Hajime
Department Of Applied Chemistry Graduate School Of Engineering Osaka Prefecture University
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Maeda Hajime
Department Of Communications Engineering Faculty Of Engineering Osaka University
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CHEN Handa
Department of Communications Engineering, Faculty of Engineering, Osaka University
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Chen Handa
Department Of Communications Engineering Faculty Of Engineering Osaka University
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