Gastric Impedance Signal Analysis Based on Wavelet Transform and Stein Unbiased Risk Estimation Rule
- VernacularTitle:基于小波变换和似然无偏估计的胃阻抗信号处理研究
- Author:
Zhangyong LI
;
Meixia WANG
- Publication Type:Journal Article
- Keywords:
wavelet transform;
gastric impedance;
multi-resolution analysis;
Stein Unbiased Risk Estimation rule
- From:
Chinese Medical Equipment Journal
1993;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objecive To discuss a denoise method of gastric impedance signal based on wavelet transform and Stein Unbiased Risk Estimation rule.Methods Firstly,the signal was decomposed by Multi-resolution Analysis(MRA).Secondly,the signal was denoised by Stein Unbiased Risk Estimation rule,whose threshold was adaptive.Results The experimentation results demonstrated that breathing and blood flowing impedance interference could be cancelled effectively by using this method.Conclusion Wavelet analysis provides a new method for further study of gastric motility signal parameter extraction.
