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plotting the magnitude and phase response of a 3rd order low pass filter defined by the equation y(n)

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Emmanuel Busina
Emmanuel Busina 2021-8-25
评论： Kritika Gupta 2023-3-2
Using MATLAB implement a code to plot the magnitude and phase response of a 3rd order low pass filter defined by the equation:
y(n) = 0.0181x(n)+0.0543x(n-1)+0.0543x(n-2)+0.0181x(n-3)+1.76y(n-1)-1.1829y(n-2)+0.2781y(n-3)

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Chunru
Chunru 2021-8-25
Ran in:
% y(n) = 0.0181x(n)+0.0543x(n-1)+0.0543x(n-2)+0.0181x(n-3)+1.76y(n-1)-1.1829y(n-2)+0.2781y(n-3)
b = [0.0181 0.0543 0.0543 0.0181];
a = [1 -1.76 1.1829 -0.2781];
freqz(b, a, 1024);
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