心电信号数字滤波处理方法

An effective digital filter for ECG

本文基于３８６心电系统，给出了一种实时处理心电信号的特定的数字低通滤波器及自适应陷波器的设计方法。该方法将数字低通滤波及自适应滤波结合起来处理心电信号，明显优于以往的整系数平滑滤波及模拟陷波等方法。该方法在８０３８６系统上运行后表明对于抑制高频肌电干扰、变频的工频干扰等具有很好的效果。

This paper discusses the design of an effective digital filter for removing noise interference from ECG. The filter combines the digital low-pass filter and the adaptive notch filter to process ECG signal in real-time. The filter is superior to normal FIR filter and analog notchfilter.The filter can effectively remove EMG interference and other high frequency interference,and it can follow the frequency change of the 50Hz interfnce and cancel the interference from the useful signal.Experimental results prove this filter to be excellent.