suggestions for highpass filter design in Matlab
1 view (last 30 days)
Show older comments
Hello,
I want to implement a digital highpass filter in Matlab which should do the same job as simple analog filter(a RC filter) having a cutoff frequency of 0.5Hz ans sampling frequency needed is 500Hz. I got the similar in this thread
d = fdesign.highpass('Fst,Fp,Ast,Ap',0.5,0.6,40,1,500);
Hd = design(d,'butter');
Is this the correct of way of implementation or does it need any changes I mean if the need is to implement a digital filter that can act similar to the analog filter.
Thanks.
0 Comments
Accepted Answer
Wayne King
on 3 Dec 2013
Edited: Wayne King
on 3 Dec 2013
Yes, that looks fine as long as you realize that you have essentially an allpass filter since you are such a low stopband frequency
d = fdesign.highpass('Fst,Fp,Ast,Ap',0.5,0.6,40,1,500);
Hd = design(d,'butter');
fvtool(Hd)
You can also use butter() to design the filter in the analog domain directly in radians/second.
N = 30;
[B,A] = butter(N,pi,'high','s');
More Answers (0)
See Also
Categories
Find more on Analog Filters in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!