designing BPFs using butter function
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Mohamed Medhat
il 19 Giu 2020
Modificato: Devineni Aslesha
il 24 Giu 2020
How do I design the following BPFs using butter function
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Devineni Aslesha
il 24 Giu 2020
Modificato: Devineni Aslesha
il 24 Giu 2020
As the frequency response of the Butterworth filter is maximally flat (no ripples), you do not have an option to specify the passband ripple and stopband attenuation values in butter function. In designfilt, you can specify the passband ripple and stopband attenuation values, however, they are not accepted for butterworth filter. You can use designfilt to design a butterworth bandpass filter as shown below.
d = designfilt('bandpassiir', 'FilterOrder', 20, 'HalfPowerFrequency1', 0.4, 'HalfPowerFrequency2', 0.6, 'DesignMethod', 'butter');
fvtool(d)
For more information, refer the following link
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