为有效滤除心电信号的工频干扰,提出了一种FIR数字滤波器设计方法,该方法设计简单、运算量小,能实现线性相移,对有用信号的影响小。理论分析和实验均表明,即使在严重干扰的情况下,该方法能有效抑制心电信号的50Hz工频干扰。

To efficiently eleminate power freguency disturbance of ECG signals a method of FIR digital filter is introduced, which is simple in design and small in the amount of calculation and able to make linear phase shift and reduce disturbance to useful signals. Theoretical analysis and experiments prove that this method can be able to efficiently restrain 50Hz disturbance of power frequency to ECG signals even in case of serious disturbance.