A normalized data-reusing least-mean-square algorithm of noise cancellation for magnetocardiography

doi:10.1088/1009-1963/13/11/009

中国物理B ›› 2004, Vol. 13 ›› Issue (11): 1820-1825.doi: 10.1088/1009-1963/13/11/009

A normalized data-reusing least-mean-square algorithm of noise cancellation for magnetocardiography

孔祥燕, 王会武, 田野, 黄旭光, 张利华, 任育峰, 陈赓华, 杨乾声

Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

收稿日期:2004-04-16 修回日期:2004-06-08 出版日期:2005-06-20 发布日期:2005-06-20
基金资助:
Project supported by Chinese Academy of Sciences (Grant No KJCX2-W4) and the Ministry of Science and Technology of China (Grant No 2002AA306412 and NKBRSF-G1999064609).

A normalized data-reusing least-mean-square algorithm of noise cancellation for magnetocardiography

Kong Xiang-Yan (孔祥燕), Wang Hui-Wu (王会武), Tian Ye (田野), Huang Xu-Guang (黄旭光), Zhang Li-Hua (张利华), Ren Yu-Feng (任育峰), Chen Geng-Hua (陈赓华), Yang Qian-Sheng (杨乾声)

Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

Received:2004-04-16 Revised:2004-06-08 Online:2005-06-20 Published:2005-06-20
Supported by:
Project supported by Chinese Academy of Sciences (Grant No KJCX2-W4) and the Ministry of Science and Technology of China (Grant No 2002AA306412 and NKBRSF-G1999064609).

摘要/Abstract

摘要： An adaptive filter based on Data-Reusing Least-Mean-Square algorithm has been proposed and applied in magnetocardiography (MCG) to suppress ambient noise. Numerical simulation studies indicate that the adaptive filter is a powerful noise suppresser for correlated interferences, especially for those with amplitude changing and time delay. Also the filter has a wide frequency bandwidth. With this filter, the signal-to-noise ratio of an MCG is improved to the intrinsic noise level. The periodic average method for further improvement of the noise level in MCG is also discussed.

Abstract: An adaptive filter based on Data-Reusing Least-Mean-Square algorithm has been proposed and applied in magnetocardiography (MCG) to suppress ambient noise. Numerical simulation studies indicate that the adaptive filter is a powerful noise suppresser for correlated interferences, especially for those with amplitude changing and time delay. Also the filter has a wide frequency bandwidth. With this filter, the signal-to-noise ratio of an MCG is improved to the intrinsic noise level. The periodic average method for further improvement of the noise level in MCG is also discussed.

Key words: magnetocardiography, noise suppression

中图分类号: (Cardiac dynamics)

87.19.Hh

84.30.Vn (Filters) 84.40.Ua (Telecommunications: signal transmission and processing; communication satellites) 02.60.-x (Numerical approximation and analysis) 02.70.Rr (General statistical methods)

孔祥燕, 王会武, 田野, 黄旭光, 张利华, 任育峰, 陈赓华, 杨乾声. A normalized data-reusing least-mean-square algorithm of noise cancellation for magnetocardiography[J]. 中国物理B, 2004, 13(11): 1820-1825.

Kong Xiang-Yan (孔祥燕), Wang Hui-Wu (王会武), Tian Ye (田野), Huang Xu-Guang (黄旭光), Zhang Li-Hua (张利华), Ren Yu-Feng (任育峰), Chen Geng-Hua (陈赓华), Yang Qian-Sheng (杨乾声). A normalized data-reusing least-mean-square algorithm of noise cancellation for magnetocardiography[J]. Chinese Physics, 2004, 13(11): 1820-1825.

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A normalized data-reusing least-mean-square algorithm of noise cancellation for magnetocardiography

A normalized data-reusing least-mean-square algorithm of noise cancellation for magnetocardiography

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