平稳小波变换和新阈值函数用于心电信号去噪  被引量:14

Stationary Wavelet Transform and New Threshold Function Used in ECG Signal Denoising

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作  者:张金玲[1] 郑鑫[1] 

机构地区:[1]北京邮电大学电子工程学院,北京100876

出  处:《北京邮电大学学报》2017年第1期28-31,共4页Journal of Beijing University of Posts and Telecommunications

摘  要:心电信号采集过程中容易受到基线漂移、工频和肌电等噪声的干扰.为了提高心电信号的信噪比,结合平稳小波变换,在使用小波阈值去噪法去燥过程中,提出一种有别于常用软硬阈值函数的新的阈值函数.通过分析实测数据验证新阈值函数,结果表明,该方法更加有效地抑制了心电信号中混入的基线漂移、工频和肌电噪声,且较好地保留了原始心电信号的特征.The electrocardiogram (ECG) signal is commonly interfered by noises of baseline drift, power frequency, and electromyography, which happens during collections. To improve the signal noise ratio of ECG signals, a threshold function was proposed in the denoising process of the wavelet threshold denois- ing method, which combining the stationary wavelet transform. And the function is different from the usu- al one. The new function is verified by analyzing the measured data, it shows that the noises which is in- troduced in the ECG signal by the baseline drift, power frequency, and electromyography, are removed more effectively, and also the characteristics of the original ECG signal are kept better.

关 键 词:心电信号 平稳小波变换 阈值函数 去噪 

分 类 号:TN911.4[电子电信—通信与信息系统]

 

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