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修改时间 03-26-2017 05:14 AM
各位好,我用labview的高级滤波器函数生成了低截止频率为100hz的巴特沃茨低通滤波器系数,然后用高级滤波器函数带入了这个系数进行滤波,输入的信号在通带内,频率是30hz,很奇怪,信号输出变得极小!照原理,我所给的信号离开截止频率很远,应该最多只有0.1db的波动(另:我用labview自带滤波器vi就没有出现这个问题),这是什么原因?!另外,我用ni公司的dfdt工具包设计的滤波器同样出现这个问题,请各位帮我看一下。具体程序如下
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