Title :
Spectrum signal de-noising based on wavelet packet
Author :
Xu Zhe ; Yang Na
Author_Institution :
Beijing Univ. of Technol., Beijing, China
Abstract :
The de-noising effects of wavelet transform, soft threshold, hard threshold and the new threshold wavelet packet were compared by simulation experiments in the paper. It is concluded that the wavelet packet has a good time and frequency domain localization properties and multi-resolution analysis, and the new threshold method can de-noise noisy spectrum effectively, overcome the constant bias and discontinuity defects of soft and hard threshold function.
Keywords :
signal denoising; wavelet transforms; frequency domain localization properties; hard threshold function; multiresolution analysis; soft threshold function; spectrum signal de-noising; threshold wavelet packet; wavelet transform; Analytical models; Equations; MATLAB; Mathematical model; Noise reduction; Time frequency analysis; Variable speed drives;
Conference_Titel :
Advanced Mechatronic Systems (ICAMechS), 2011 International Conference on
Conference_Location :
Zhengzhou
Print_ISBN :
978-1-4577-1698-0
