Real Wavelet Transform-Based Phase Information Extraction Method: Theory and Demonstrations
Real Wavelet Transform-Based Phase Information Extraction Method: Theory and Demonstrations
复制标题
基于实小波变换的相位信息提取方法:理论与演示
DOI:
10.1109/tie.2008.2004389
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发表时间:
2009-03
期刊:
影响因子:
--
通讯作者:
中科院分区:
文献类型:
--
作者:
Complex wavelet transform (CoWT)-based phase information (PI) extraction methods are popular. None of them is simultaneously simple, fast, and nonredundant. Real discrete wavelet transform (RDWT) is simple, fast, and nonredundant, but it is usually regarded to be lacking PI. After finding out that RDWT conserves the PI of an analyzed signal, this paper proposed three RDWT-based PI extraction methods and proved that RDWT-based PI extraction methods are equal to CoWT-based ones from the mathematical point of view. Therefore, RDWT-based methods not only can extract PI but also can inherit all merits of RDWT. This paper further presented a quadrature procedure to extract the actual phase of single-frequency or asymptotic signals. Test examples demonstrated that the extracted PI by using the CoWT- and RDWT-based methods is almost the same, and the extracted phase curves by using the RDWT-based quadrature method are really the actual ones. Some engineering applications of the proposed method are discussed, and the PI extraction programs of the method are given.
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DOI:
10.1007/978-94-015-9715-9_2
发表时间:
2001
期刊:
--
影响因子:
--
作者:
I. Selesnick
通讯作者:
I. Selesnick
影响因子:
7.7
作者:
T. Chow;Shi Hai
通讯作者:
T. Chow;Shi Hai
影响因子:
2
作者:
DAUBECHIES, I
通讯作者:
DAUBECHIES, I
影响因子:
20.6
作者:
OPPENHEIM, AV;LIM, JS
通讯作者:
LIM, JS
影响因子:
20.6
作者:
R.N. Bracewell
通讯作者:
R.N. Bracewell