nth order filter approximations to LPF not giving proper results
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Bhaskar
am 26 Jun. 2023
Kommentiert: Bhaskar
am 28 Jun. 2023
Hi , i am trying to implement an analog filter Butterworth Low pass filter and want to observe the effect of order over the magnitude of that filter I have tried using the inbuilt 'butter(n,Wn,ftype)' filter but want to implement the same using the base algoritm without any inbuilt function .I have tried but not getting the proper results .
The input parameters are as follows:
Wc=pi/2.
w=(0,4*Pi) at 8pi/1000 intervals .
Thanks in advance .
1 Kommentar
Akzeptierte Antwort
Harsh Kumar
am 27 Jun. 2023
Hi Bhaskar,
I understand that you are trying to implement an analog butterworth filter with the given specifications programmatically instead of using MATLAB in-built ‘butter’ function .
You can use the fundamental mathematical strategy to implement it in MATLAB as well.
Please refer to the below code snippet for better understanding.
%frequency over which you are iterating
w=0:8*pi/1000:4*pi;
%cutt-off frequency
wc=pi/2;
%pre-setting to zero
H_w_2=zeros(1,length(w));
%checking for multiple orders(optional)
for N=1:5:11
num=1;
den=zeros(1,2*N);
den(1)=1;
for i=1:1:length(w)
%implement the equation of butterworth filter
H_w_2(i)=1/(1+power(w(i)/wc,2*N));
end
plot(w,abs(H_w_2));
hold on
end
legend('N=1','N=6','N=11')
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Kaiser finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!