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2012 | OriginalPaper | Buchkapitel

165. Improved Wavelet Threshold Denoising Method for Railway Signal

verfasst von : Juan Zou, Shijie Jia, Shaohua Chen

Erschienen in: Electrical, Information Engineering and Mechatronics 2011

Verlag: Springer London

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Abstract

Railway signals are inevitably mixed with a variety of noise. Therefore noise reduction becomes crucial in railway operations. In this paper, the wavelet threshold denoising method was applied to railway signals. A new wavelet threshold function was proposed to overcome the disadvantages of soft threshold and hard threshold. The new method is more smoothing. More details of the signals are reserved. The obtained simulation results show that the new thresholding algorithm has better denoising effect in signal to noise ratio (SNR), minimum mean square error (MSE), and results in closer approximation to the real signals, compared with hard thresholding and soft thresholding methods.

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Literatur
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Zurück zum Zitat Zhu YQ, Yang XL (2008) Several new methods based on wavelet thresholding denoising. Electron Test 2(2):18–22 Zhu YQ, Yang XL (2008) Several new methods based on wavelet thresholding denoising. Electron Test 2(2):18–22
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Zurück zum Zitat Liu HB, Han SQ (2007) Wavelet de-noising based on novel thresholding function and best decomposition scale. Comput Eng Appl 43(24):72–74 Liu HB, Han SQ (2007) Wavelet de-noising based on novel thresholding function and best decomposition scale. Comput Eng Appl 43(24):72–74
Metadaten
Titel
Improved Wavelet Threshold Denoising Method for Railway Signal
verfasst von
Juan Zou
Shijie Jia
Shaohua Chen
Copyright-Jahr
2012
Verlag
Springer London
DOI
https://doi.org/10.1007/978-1-4471-2467-2_165

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