Pondicherry University 2011 B.Tech Electronics and Communications Engineering - Signals and Systems - Question Paper

PART-A (10*2=20 marks)

ans all ques..

1. describe unit impulse function.

2. what is system?

3. describe DFT pair.

4. State any 2 properties of LT.

5. Write any 2 convolution properties.

6. describe LT pairs.

7. How to represent discrete time system?

8. State any 2 prperties of ROC.

9. What is frequency response?

10. State the relation ranging from DTFT and z-Transform.

PART-B (5*11=55 marks)

UNIT I

11. obtain the different classification of the subsequent system y(n)=x(n)x(n-1).

or

12. obtain the odd and even component of x(t)=cost+sint+costsint.

UNIT II

13. obtain the trigonometric Fourier series for the periodic signal x(t) in Figure.
For this question, the figure has attached

or

14. state and prove any 3 properties of Fourier series.

UNIT III

15. Solve the differential formula using laplace transform
d^2 y(t)/dt^2 +2y(t) = d/dt x(t) it y(0) = two dy(0)/dt = one and x(t) = e^=t u(t).

or

16. State any prove any two convolution Interval properties.

UNIT IV

17. Consider
y(n)-1/6 y(n-1) - 1/6 y(n-2) = x(n). Determine frequency response and impulse response of the system.

or

18. obtain the inverse z-Transform of x(z) = z(z-1)/(z+2)^3(z+1).

UNIT V

19. obtain the impulse response and step response for the subsequent system
y(n) - 3/4 y(n-1) + 1/8 y(n-2) = x(n).

or

20. obtain the convolution of
x(n) = {1,2,3,2} & h(n) = {1,2,2} using graphical method.

Attachment: pondicherry-university-2011-b-tech-electronics-and-communications-engineering-3849-1.jpg

Earning:   Approval pending.