Simultaneous removal of harmonic interference and white noise by combining mufti-irate signal processing and wavelet denoising techniques

被引：0
作者：
Han, Jun [2 ]
Hao, Ying [3 ]
Xu, Lijun [1 ]
机构：
[1] Beihang Univ, Sch Instrument Sci & Optoelect Engn, Beijing 100083, Peoples R China
[2] Capital Normal Univ, Dept Educ Technol, Beijing 100037, Peoples R China
[3] Tianjin Univ, Sch Elect Engn & Automat, Tianjin 300072, Peoples R China
来源：
2007 IEEE INSTRUMENTATION & MEASUREMENT TECHNOLOGY CONFERENCE, VOLS 1-5 | 2007年
关键词：
signal recovery; harmonic interference; white noise; wavelet denoising; multi-rate;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper a new method is presented for simultaneous removal of harmonic interference and white noise by combining multi-rate signal processing and wavelet denoising techniques. The contaminated signal is first resampled to a higher but the nearest frequency that meets a prerequisite. The signal is then transformed into the time-scale domain by the orthogonal wavelet decomposition (OWD). In each sub-band of the time-scale domain, multi-rate signal processing is used to remove harmonic interference and wavelet shrinkage is used to remove white noise. Compared with the wavelet packet decomposition (WPD), the orthogonal wavelet decomposition is more time-efficient. Evaluation of the new method is carried out by using four test signals and comparison with the direct wavelet shrinkage method is given.
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页码：1164 / +
页数：3
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