Study of Parameter Decision for a Noise Rejection Method Using ICA for a Magnetocardiogram
Study of Parameter Decision for a Noise Rejection Method Using ICA for a Magnetocardiogram
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DOI：
10.3379/msjmag.1002r0009
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发表时间：
2010
影响因子：
--
通讯作者：
K. Oyamada;Koichiro Kobayashi;M. Yoshizawa;Y. Uchikawa
中科院分区：
文献类型：
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作者：
K. Oyamada;Koichiro Kobayashi;M. Yoshizawa;Y. Uchikawa
研究了心磁图（MCG）中基于独立分量分析（伊卡）的环境磁噪声抑制方法。在伊卡中，当数据的SN比降低时，噪声抑制的精度变低，并且变得难以达到关于收缩维度的判定。为了解决这些问题，我们检查了伊卡的变换矩阵W的初始值。提出了一种变换矩阵W的初始值确定方法，提高了噪声抑制的精度。对不同信噪比的MCG进行了验证。实验结果表明，该方法对提高噪声抑制效果是有效的。
We studied an environmental magnetic noise rejection method using independent component analysis (ICA) for a magnetocardiogram (MCG). In the ICA, when the SN ratio of the data is reduced, the accuracy of the noise rejection becomes low and it becomes difficult to reach a decision regarding the contraction dimension. In order to solve these problems, we examined the initial value of the transformation matrix W of the ICA. We proposed an initial value decision procedure for the transformation matrix W, and as a result the accuracy of the noise rejection was improved. Verification was carried out for MCGs with various SN ratios. It was shown that this method was effective for improving noise rejection.