收稿日期: 2008-10-16
修回日期: 2009-03-09
网络出版日期: 2009-07-15
基金资助
国家自然科学基金(60702015)资助
Improved method of instantaneous frequency estimation based on wavelet ridge
Received date: 2008-10-16
Revised date: 2009-03-09
Online published: 2009-07-15
汪赵华 , 郭立 , 李辉 . 基于改进小波脊提取算法的数字信号瞬时频率估计方法[J]. 中国科学院大学学报, 2009 , 26(4) : 466 -473 . DOI: 10.7523/j.issn.2095-6134.2009.4.006
In order to meet the precision requirement of digital signal instantaneous frequency estimation, an improved algorithm is proposed based on deep analyses of the principle of wavelet ridge. The major improvements of the algorithm include the arrangements on initial values, analytical wavelet's parameter and estimation precision of iterative process. Experimental signal results show that the improved algorithm is more robust and practical.
Key words： digital signal; instantaneous frequency; wavelet ridge
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