基于DSP的去除ECG工频干扰的陷波滤波器设计

Designing Of A Notch Filter Based On DSP Technology For Eliminating Power-line Interference From ECG

本文详细介绍了在以DSP为核心的心电监护仪中对50Hz工频干扰去除算法的实现方法。首先应用Matlab工具设计一个50Hz陷波滤波器,通过仿真确定合适的滤波器系数,然后充分利用DSP的软硬件特点,在DSP系统上实现该算法,并做了详细的分析和仿真。结果显示,系统能很好地去除50Hz干扰,并且速度较快符合实时性要求。

This paper introduced a notch filter to Eliminate Power-line Interference from ECG signals applying for the ECG monitoring system based on DSP.First,we designed a notch filter at 50 Hz and calculated favorable coefficients by using MATLAB.Then this digital filer was applied on the real ECG signals in the DSP system.The program algorithm makes full use of the advantage of DSP.At last,we analyzed the results in details.The results indicated the power-line interference was eliminated effectively and the processing speed can meet clinical real-time applications.