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Plot the amplitude and phase response for the given FIR system.

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Abod
Abod 2023-2-9
回答： Sulaymon Eshkabilov 2023-2-10
1-2z^-1+4z^-2
Plot the amplitude and phase response for the given FIR system.

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回答（2 个）

Sarvesh Kale
Sarvesh Kale 2023-2-10
Ran in:
Hi Abod,
To plot the frequency response of FIR system use the following code
b=[1 -2 4]; % define numerator coefficient
a=[1]; % define denominator coefficient
figure ;
freqz(b,a,2048) % plot frequency response for 2048 points
You can take a look at following documentation of freqz and phasez to get more information on them
https://in.mathworks.com/help/signal/ref/freqz.html and
https://in.mathworks.com/help/signal/ref/phasez.html
I hope this answers your queries, please accept the answer if it does.
Thank you.
Sulaymon Eshkabilov
Ran in:
Use tf() and bode():
z = tf('z',0.1);
H = (4*(z^-2)-2*(z^-1)+1) /1
H = z^3 - 2 z^2 + 4 z ----------------- z^3 Sample time: 0.1 seconds Discrete-time transfer function.
bode(H)

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