| Wavelet Packet Decomposition Based on Entropy Threshold for White-noise Rejection in PD Signal |
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| 作者姓名： | BI Wei min SUN Cai xin YAO Chen guo SONG Sheng li TANG Ju |
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| 摘 要： | This paper analyzes the different characteristics of white-noise interference in the signals of partial discharge (PD) after wavelet transform. There is high value in lots of scales for PD and white-noise interference is to zero with increasing scale. The threshold is set for wavelet coefficient in all scales. If the coefficient of signal is higher than the threshold, it is PD signal. Otherwise it is noise interference. A threshold-based wavelet packet transform (WPT) algorithm is put forward to suppress white noise interference in PD signals. The results testifies that it has a favorable adaptability to extract PD signals using WPT.
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| 关 键 词： | partial discharge white noise interference wavelet packet decomposition threshold |
| 修稿时间： | 2003/2/18 0:00:00 |
Wavelet Packet Decomposition Based on Entropy Threshold for White-noise Rejection in PD Signal |
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| BI Wei min,SUN Cai xin,YAO Chen guo,SONG Sheng li,TANG Ju.Wavelet Packet Decomposition Based on Entropy Threshold for White-noise Rejection in PD Signal[J].Storage & Process,2003(6):53-55. |
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| Authors: | BI Wei min SUN Cai xin YAO Chen guo SONG Sheng li TANG Ju |
| |
| Abstract: | This paper analyzes the different characteristics of white-noise interference in the signals of partial discharge (PD) after wavelet transform. There is high value in lots of scales for PD and white-noise interference is to zero with increasing scale. The threshold is set for wavelet coefficient in all scales. If the coefficient of signal is higher than the threshold, it is PD signal. Otherwise it is noise interference. A threshold-based wavelet packet transform (WPT) algorithm is put forward to suppress white noise interference in PD signals. The results testifies that it has a favorable adaptability to extract PD signals using WPT. |
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| Keywords: | partial discharge white noise interference wavelet packet decomposition threshold |
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