摘要
目的:设计和实现一种用于消除ECG信号中50 Hz工频干扰的新型IIR自适应陷波器。方法:利用Steiglitz-McBride Method(SMM)方法跟踪工频频率,设计基于零极点分布的陷波器,应用最小平方逼近方法得到对称、可控的通带增益。结果:仿真显示设计的新型自适应陷波器能够正确地估计和实时地跟踪工频频率,陷波器的通带增益也可以通过改进的算法得到控制。结论:该陷波器能够有效地跟踪和消除心电信号中的工频干扰。
Objective To design and implement a new IIR adaptive notch filter （ANF） for eliminating AC power frequency interference of 50Hz on ECG signals. Methods By using Steiglitz McBride method （SMM） to track the power frequency, the ANF was designed based on the pole-zero placement algorithm, applying least square approximation to obtain symmetrical and controllable pass-band gain. Results The simulation showed that the new ANF produced an accurate estimation and precise tracking abilities of notch frequencies. In addition, the pass-band gain of the new IIR ANF was controlled by the proposed algorithm.Conclusion The ANF can successfully track and eliminate the power frequency of ECG signals.
出处
《医疗卫生装备》
CAS
2008年第8期15-18,共4页
Chinese Medical Equipment Journal
