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y[n] = x[n] - x[n-1] x[n-2] I need to find a) Find the transfer function. b) Give the impulse response. d) Sketch the frequency respo

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Rhea Shah
Rhea Shah on 6 Apr 2020
Commented: Rhea Shah on 9 Apr 2020
I need to find a) Find the transfer function. b) Give the impulse response. d) Sketch the frequency response. How to do it?
[n] = x[n] - x[n-1] + x[n-2]

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Answers (1)

Birdman
Birdman on 7 Apr 2020
Try this:
z=tf('z',0.001);
Gz=1-z^-1+z^-2;
%%transfer function
Gs=d2c(Gz,'tustin')
%%impulse response
figure(1);
impulse(Gs)
%%frequency response
figure(2);
bode(Gs)

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Birdman
Birdman on 7 Apr 2020
Do you have Control System Toolbox installed? Type
ver
in command line and paste the output here.
Rhea Shah
Rhea Shah on 9 Apr 2020
Hey thank you so much. I got the impulse and frequency response output. But i am not getting transfer function output as I don't have the tool box installed. I have the 2019a version. Is there some another approach to it?

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