A real signal x[n] with Fourier transform X(ejΩ) Has following property X[n] =0 for n>0 X[0] >0 Im {X(ejΩ) =sin Ω-sin 2Ω} The signal x (n) is

1.  2δ[n]-δ[n+1]-δ[n+3]

2.  δ[n]+δ[n+1]-δ[n+3]

3.  δ[n]+δ[n+1]-δ[n+2]

4.  2δ[n]-δ[n+1]-δ[n+2].

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4
Correct Answer :

δ[n]+δ[n+1]-δ[n+2]


Explanation :
No Explanation available for this question

A discrete-time system with input x[n] and output y[n] is described by the relation The response of the system to the input x[n] =δ[n] is

1.  

2.  

3.  

4.  

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Correct Answer :


Explanation :
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The system described by the system to the input y (n)-2y (n-1)+y (n-2) =x (n)-x (n-1) ha y (n) =0 and n

1.  2

2.  1

3.  Zero

4.  -1.

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4
Correct Answer :

Zero


Explanation :
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Given that F(z) and G(z) are the one-sided Z transforms of discrete time functions f(nT) and g(nT), the Z transform of is given by

1.  

2.  

3.  

4.  

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Correct Answer :


Explanation :
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Consider the following statements regarding linear discrete-time system The system is stable. The initial value h (0) of the impulse response is -4. The steady-state output is zero for a sinusoidal discrete-time input of frequency equal to the fourth the sampling frequency Which of these statements are correct?

1.  1, 2 and 3

2.  1 and 2

3.  1 and 3

4.  2 and 3.

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4
Correct Answer :

1 and 3


Explanation :
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Which one of the following is the correct space realization of a discrete system given by the difference equation c (k+2)+αc(k+1)+βc(k) =u(k)

1.  

2.  

3.  

4.  

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Correct Answer :


Explanation :
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Consider the compound system shown in the above figure. Its output is equal t input with a delay of two units. If the transfer function of the system is given by

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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The Z-transform of the time function is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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The Z-transform F(z) of f(nT) =anT is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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The region of convergence of the Z-transform of a unit step function is

1.  |z|>1

2.  |z|

3.  (real part of z)>0

4.  (Real part of z)

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4
Correct Answer :

|z|>1


Explanation :
No Explanation available for this question
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