Question

signals and systems

How to solve if coefficients are:
A= -2
B = 1
C = 2

zBzC (b) (24 points) For the additional information given in each case below, determine the output ya for all n. (i) The syst

(c) (8 points) For the (non-causal) system implied by the information given in part (b.ii), determine the response to the inp

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Answer #1

Y(z)=-2z/(z-1)+z/(z+1/2)+2z/(z-2)

(i) system is causal for x(n)=2^n u(n)

ROC : |z|>2

y(n)=-2*u(n)+(-1/2)n u(n)+2(2)nu(n)

(ii) system is stable , x(n)=2*u(-n-1)

input is anticausal,

System is stable means ROC contains the unit circle,

Hence ROC |z|<2

Y(n)=2u(-n-1)-(-1/2)n u(-n-1)-2(2)nu(-n-1)

(iii) causal and stable ,ROC of input is |z|<1

y(n)=(-1/2)u(n)

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