data_load.py 文件源码

def simple_lf_filter(signal, sample_rate=1000):
    W = fftfreq(signal.size, d=1/float(sample_rate))
    f_signal = rfft(signal)
    cut_f_signal = f_signal.copy()
    cut_f_signal[(W<5)] = 0
    return irfft(cut_f_signal).astype('int16')