| 数字滤波在心磁噪声抑制中的应用 |
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| 引用本文： | 孔祥燕,王会武,朱学敏,田野,任育峰,于洪伟,陈赓华,张利华,杨乾声.数字滤波在心磁噪声抑制中的应用[J].低温物理学报,2005,27(2):170-173. |
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| 作者姓名： | 孔祥燕 王会武 朱学敏 田野 任育峰 于洪伟 陈赓华 张利华 杨乾声 |
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| 作者单位： | 中国科学院物理研究所,北京,100080;中国科学院物理研究所,北京,100080;中国科学院物理研究所,北京,100080;中国科学院物理研究所,北京,100080;中国科学院物理研究所,北京,100080;中国科学院物理研究所,北京,100080;中国科学院物理研究所,北京,100080;中国科学院物理研究所,北京,100080;中国科学院物理研究所,北京,100080 |
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| 基金项目： | 中国科学院科研项目，科技部资助项目 |
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| 摘 要： | 提出了一种基于数据重置最小均方算法的自适应数字滤波器, 并将其应用于抑制心磁信号的背景噪声. 数值模拟结果表明该滤波器对于相关噪声,尤其是有幅值变化和时间延迟的情况, 有很强的抑制效果. 该滤波器有很宽的带宽.利用它可以使心磁信号的信噪比提高到器件的本征噪声水平. 利用周期平均的方法进一步提高信噪比, 对滤波前后心磁信号的频谱进行了分析.
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| 关 键 词： | 心磁 自适应算法 噪声抑制 |
| 修稿时间： | 2004年10月15 |
THE APPLICATION OF DIGITAL FILTER IN MAGNETOCARDIOGRAPHY (MCG) NOISE SUPPRESSION |
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| KONG Xiang-yan,WANG HUI-WU,ZHU XUE-MIN,TIAN YE,REN YU-FENG,YU HONG-WEI,CHEN GENG-HUA,ZHANG LI-HUA,YANG QIAN-SHENG.THE APPLICATION OF DIGITAL FILTER IN MAGNETOCARDIOGRAPHY (MCG) NOISE SUPPRESSION[J].Chinese Journal of Low Temperature Physics,2005,27(2):170-173. |
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| Authors: | KONG Xiang-yan WANG HUI-WU ZHU XUE-MIN TIAN YE REN YU-FENG YU HONG-WEI CHEN GENG-HUA ZHANG LI-HUA YANG QIAN-SHENG |
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| 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 a MCG is improved to the intrinsic noise level. Further improvement of signal-to-noise ratio has been made by the periodic average method. The frequency spectrum of the signals is also analyzed and discussed. |
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| Keywords: | Magnetocardiography Adaptive algorithm Noise suppression |
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