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我的寄存器配置如下:
125Hz的采样率下,对原始信号做了FFT频谱分析,结果图如下:
500Hz的采样率下,对原始信号做了FFT频谱分析,结果图如下:
但结果还是不行,我改变为45Hz的低通滤波也是如此,且变得更加不稳定,这是什么原因呢?
滤波器的阶数是161阶,但40阶的效果反而更好