NDLI: Wavelet Packet Threshold Approach to Denoising Piezoelectricity Gyro Signal

Content Provider	IEEE Xplore Digital Library
Author	Zhang Yong-xiang Zhao Xiao-xu Yuan Hui-mei Zhang Wei-gong
Copyright Year	2009
Abstract	Signals output from the Gyros usually contain turbulent noise, which comes down the signal accuracy and lowers the systems’ function. So denoising is necessary. an algorithm, based on three-layer wavelet packet transform of semisoft threshold, was applied to process the gyro’s state signal. The decomposition coefficient of each node was got from the decomposition of third-layer wavelet packet.We let the high-frequency transient part(greater than threshold)to be zero by a elimination algorithm, reconstructed the nodes to eliminate the noise and period components . This method, compared with soft and hard threshold denoising methods, overcomes their shortcomings and at the same time, its denoisng effects are better than the former two.
Starting Page	266
Ending Page	269
File Size	864508
Page Count	4
File Format	PDF
ISBN	9781424433346
DOI	10.1109/ICCET.2009.181
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-01-22
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wavelet transforms Algorithm design and analysis Noise reduction Piezoelectricity Signal processing Reconstruction algorithms Wavelet analysis Frequency conversion Wavelet packets Signal analysis
Content Type	Text
Resource Type	Article

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Wavelet Packet Threshold Approach to Denoising Piezoelectricity Gyro Signal