基于MATLAB的FIR带阻数字滤波器的设计

由于生物医学信号处理过程中易混入50Hz噪声的特点，本文利用程序设计法和FDATool设计法，设

计一带阻滤波器，并将设计的滤波器应用到一混和正弦信号，通过测试检验，该滤波器可以很好地消除50Hz的工

频干扰。-】To prevent the biomedical signals from being disturbed by 50Hz noise easily，the paper designs a

bandstop digital filter by procedure and FDATool method．The filter is tested by a blended 81ne wave experimentally and the

result shows that the filter can cancel the 50Hz noise very well．