Digital signal processing questions and answer unit 1

CS 2403 DIGITAL SIGNAL PROCESSING

VII CSE A & B

TIME: 1 hour 40 minutes                                                      MAX.MARKS:50

Answer ALL questions

PART A- (5X2=10 MARKS)

1. State sampling theorem?
2. What is meant by energy and power signal?
3.  What is meant by aliasing? How can it be avoided?
4. Is the system y (n) = ln [x (n)] is linear and time invariant?
5. Determine Z transform of x(n) = 5ⁿu(n)

PART B- (40 MARKS)

11. Consider a system y(n) +  y(n – 1) = x(n) +  x(n – 1). Find transfer function, and impulse response the system.                                                                                                (8)    

22.   Find the Z transform of                                                                                         (4 + 4)

(     (a)   x(n) = 2ⁿ u(n – 2)
(b)   x(n) = n² u(n)
(c).Determine and prove any 3 properties of z- transform                                         (8)
3.      Find the linear convolution  of                        

1.