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Hello I'm a beginner with Matlab and need help designing a filter

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James
James 2018-2-10
评论： James 2018-2-13
I was thinking of doing a 4th order Butterworth bandpass filter with center frequency of 455KHz and bandwidth of 100KHz. The passband gain should be 10dB

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Peter
Peter 2018-2-10
Have you started with this?
https://www.mathworks.com/discovery/filter-design.html
Also
filterDesigner
is a good tool.
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James
James 2018-2-13
[A,B,C,D]=butter(10,[395 405]/750);
d = designfilt('bandpassiir','FilterOrder',4,...
'HalfPowerFrequency1',395,'HalfPowerFrequency2',405 ...
'SampleRate',1500);
sos=ss2sos(A,B,C,D);
fvt=fvtool(sos,'Fs',1500);
legend(fvt,'butter','designfilt')
James
James 2018-2-13
I'm getting this error message
'SampleRate',1500);
↑
Error: Unexpected MATLAB expression.

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