This is the firt time to learn program in matlab. And now I get a problem . I want to design a IIR butterworth low pass filter, order 10 and cutoff frequency pi/2. How should I start the problem or what kind of function shoud I use .
Can anyone give me some suggestions ? Thanks very much!

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Wayne King
Wayne King am 13 Jun. 2012

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Have you read the reference page for butter.m?
[B,A] = butter(10,1/2);
% Visualize filter
fvtool(B,A)

3 Kommentare

Qifei
Qifei am 13 Jun. 2012
not yet .. where is it? could you please give me the link? thanks for your advice .
Wayne King
Wayne King am 13 Jun. 2012
>>doc butter
Walter Roberson
Walter Roberson am 13 Jun. 2012
http://www.mathworks.com/help/toolbox/signal/ref/butter.html

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