# 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 6 Apr 2020
댓글: Rhea Shah 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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Rhea Shah 6 Apr 2020
clc;
clear all;
close all;
num=[1.0 -1.0 1.0]
den=[1.0]
y=impz(nu,den);
stem(y);
Steven Lord 6 Apr 2020
Rhea Shah 7 Apr 2020
Is the approach corect?

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### 답변(1개)

Birdman 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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Rhea Shah 7 Apr 2020
R2020a
Birdman 7 Apr 2020
Do you have Control System Toolbox installed? Type
ver
in command line and paste the output here.
Rhea Shah 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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