Question
Given the z-transform pair, x [n] X (z) =(z^-1)/(1+0.8z^-1) with ROC: |Z| > 0.8 use the z-transform properties to determine the z-transform of the following
Given the z-transform pair,
x [n] →X (z) =(z^-1)/(1+0.8z^-1) with ROC: |Z| > 0.8
use the z-transform properties to determine the z-transform of the following sequences:
a) y[n] = x[n+2]
b) y[n] = (5/4)n x[n]
c) y[n] = (n+1) x[n-1]
d) y[n] = x[n] * x[2-n] (* represents convolution)
PROBLEM 2
a) A system has the transfer function
H(z) =(z^-1)/(1+4z^-2)
We know that the system is causal. Is it stable? Why?
b) A system has two poles:
p1 = -0.32, p2 = 0.6
-Its region of convergence is ROC: 0.6 < |z| < 2. Is it stable? Is it causal? Why?
PROBLEM 3
Consider a causal LTI system described by the difference equation:
y[n] = y[n-1] + y[n-3] + x[n-2]
with initial conditions:
y[-1] = 1, y[-2] = 0, y[-3] = -1.
x[-1] = 2, x[-2] = 1, x[-3] = 5
-What is the one-sided z-transform of y[n]?
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Authors: James T. McClave, Terry T Sincich
12th Edition
9780321831088, 321755936, 032183108X, 978-0321755933
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