Weak biosignal processing using adaptive wavelet neural network

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Abstract

How to detect the weak signals buried in noises is a fundamental and important problem. Conventional wavelet denoising fails for signals with low signal-to-noise ratio (SNR). This paper discussed an approach which is based on the use of adaptive wavelet probabilistic neural network (AWPNN). The biorthogonal 9-7 wavelet is used to extract the features from original signal, and then the probabilistic neural network (PNN) is used to analyze the meaningful features and perform discrimination tasks. Simulations indicated that the AWPNN is suitable for increasing the SNR of weak signals which commonly have below 0 dB SNR, and our method can deal with the signals with fairly low (approximately -20 dB) SNR.

Original languageEnglish
Title of host publicationProceedings - International Conference on Computer Science and Software Engineering, CSSE 2008
Pages24-27
Number of pages4
DOIs
StatePublished - 2008
EventInternational Conference on Computer Science and Software Engineering, CSSE 2008 - Wuhan, Hubei, China
Duration: 12 Dec 200814 Dec 2008

Publication series

NameProceedings - International Conference on Computer Science and Software Engineering, CSSE 2008
Volume1

Conference

ConferenceInternational Conference on Computer Science and Software Engineering, CSSE 2008
Country/TerritoryChina
CityWuhan, Hubei
Period12/12/0814/12/08

Keywords

  • Adaptive wavelet neural network(AWNN)
  • Denoising
  • Signal processing
  • Signal-to-noise ratio (SNR)

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