重合波检测的匹配滤波法提取胎儿心电  

Coincidence Detection of Matched Filter Method Extraction Fetal ECG

作　　者：王乾[1] 侯世芳 张正旭 宋立新[3] WANG Qian;HOU Shi-fang;ZHANG Zheng-xu;SONG Li-xin(School of Computer Science and Technology, Harbin University of Science and Technology, Harbin 150080,China;School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China;School of Measurement-Control Technology and Communication Engineering, Harbin University of Science and Technology, Harbin 150080, China)

机构地区：[1]哈尔滨理工大学计算机科学与技术学院,哈尔滨150080 [2]哈尔滨理工大学电气与电子工程学院,哈尔滨150080 [3]哈尔滨理工大学测控技术与通信工程学院,哈尔滨150080

出　　处：《哈尔滨理工大学学报》2021年第5期91-96,共6页Journal of Harbin University of Science and Technology

基　　金：黑龙江省自然科学基金资助项目(F200912);哈尔滨创新人才基金资助项目(2010RFXXS026).

摘　　要：针对当母体腹部心电信号时域上存在母亲心电和胎儿心电重合波时,致使胎儿心电有效提取这个难题,提出了一种重合波检测的改进匹配滤波法的解决方案。首先对信号滤波,去除基线漂移及高频干扰,增强母亲心电信号和胎儿心电信号;然后引入平均心拍得到母亲心电QRS模板信号,并结合匹配滤波法检测腹部心电重合波;最后结合母亲心电QRS波模板的峰的位置调整、匹配滤波法以及相似度的计算,获得胎儿心电。实验结果显示,对MIT Physio Net/Cin C2013数据库中存在母亲心电与胎儿心电重合波的母体腹部心电信号,提取的胎儿心电准确率达到92%,与传统匹配滤波法提取的胎儿心电相比,准确率得到提高。To solve the problem that fetal electrocardiogram is difficult to extract when there are mother electrocardiogram and fetal electrocardiogram coincidence in the time domain of maternal abdominal electrocardiography,a modified matched filtering method is proposed for coincidence detection.The method first preprocesses the signal,removes the baseline drift,enhances the mother′s ECG signal and fetus ECG signal,introduces the average heartbeat to obtain the mother′s ECG QRS template signal,and combined with matched filtering method to extract the abdominal ECG coincidence wave.Finally,matched filter method combined with the mother′s ECG R-peak position adjustment and the similarity calculation to obtain fetal ECG.The experimental results show that the accuracy of fetus electrocardiogram is 92%in the MIT PhysioNet/Cin C2013 database,which shows that there existed maternal ECG and fetal ECG coincidence wave in time domain.Compared with the traditional matched filter method to extract fetal ECG,the accuracy is improved.

关 键 词：胎儿心电信号 小波分析 匹配滤波 相似度 

分 类 号：TN911.7[电子电信—通信与信息系统]