基于小波变换和匹配滤波的胎儿心电信号R波检测

Detection of R-wave in Fetal ECG Based on Wavelet Transform and Matched Filtering

针对母体腹壁心电信号的特点,采用一种基于小波变换和匹配滤波的方法对腹壁信号进行胎儿心电信号的R波检测。该方法先用平稳小波变换得到信号的高频系数,再用算术平均法获得母亲的QRS波模板,最后采取匹配滤波法进行胎儿心电信号的R波检测。实验结果表明,该方法能够有效地消除母亲心电信号以及基线漂移等噪声,对胎儿心电的R波检测具有较高的准确性。

By analyzing the characteristics of maternal abdominal ECG （Electrocardiogram）, a method based on wavelet transform and matched filtering is proposed to detect the R-wave in fetal ECG （FECG）. In this method, the high-frequency coefficients are calculated by using wavelet transform. First, the maternal QRS template is obtained by using the arithmetic mean scheme. Finaly,the R-wave of FECG is detected based on matched filtering. The experimental results show that this method can effectively eliminate the noises, such as the maternal ECG signal and baseline drift, enhancing the accuracy of the detection of fetal ECG.