Im trying to make an 4th Order Chebyshev, with these settings. Wp = 0.9999;
Ws = .0250;
Rp = 1;
Rs = 50;
[n,Wp] = cheb1ord(Wp,Ws,Rp,Rs)
n = 4
[b,a] = cheby1(n,Rp,Wp);
freqz(b,a,500,200)
title('n = 4th Order Chebyshev Type I ECG Lowpass Filter')
I want my cutoff frequency to be 40Hz by using Wp/Ws. (I believe thats the cutofff frequency for the cheby?) And once those variables are saved and I enter [n,Wp] = cheb1ord(Wp,Ws,Rp,Rs), my n changes to 1. Why is that?
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