data_quality_led.py 文件源码

def bandpassfilter(x,fs):
    """

    :param x: a list of samples 
    :param fs: sampling frequency
    :return: filtered list
    """
    x = signal.detrend(x)
    b = signal.firls(129,[0,0.6*2/fs,0.7*2/fs,3*2/fs,3.5*2/fs,1],[0,0,1,1,0,0],[100*0.02,0.02,0.02])
    return signal.convolve(x,b,'valid')