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基于核主成分分析的EMD去噪算法

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摘要 本文以超声回波信号去噪为目的,研究了基于经验模态分解(EMD)分解的去噪方法。分解过程中固有模态函数(IMF)信号与噪声混叠,还会产生虚假分量,提出了基于核主成分分析(KPCA)的经验模态分解算法。首先对原信号进行经验模态分解得IMF分量;然后对信号进行KPCA变换,将各分量获得的贡献率与阈值比较,最终以去除分量中夹杂的噪声。为证明本文方法的有效性,还给出了仿真实验的仿真结果。
作者 何云玲 刘琳
出处 《数字技术与应用》 2014年第1期120-120,共1页 Digital Technology & Application
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