25-08-2017, 09:32 PM
Digital Signal Processing For THIRD IT AND FINAL CSE TWO MARKS QUESTIONS
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1. What is meant by aliasing? How can it be avoided?
2. Find the energy and power of x(n) = Aejωn u(n).
3. Determine which of the following sequences is periodic, and compute their fundamental period. (a) Aej7πn (b) sin(3n)
4. Is the system y (n) = ln [x (n)] is linear and time invariant?
5. Determine Z transform of x(n) = 5nu(n)
6. State sampling theorem.
7. Find the signal energy of (1/2)n u(n)
8. Determine whether the following sinusoids is periodic, if periodic then compute their fundamental period. (a) cos 0.01πn (b) sin(π62n/10)
9. Check whether the system y(n) = ex (n) is linear.
10. Determine Z transform of x(n) = anu(n)
11. How DFT is differ from DTFT
12. Find DFT of sequence x(n) = {1, 1, -2, -2}
13. What are the computational saving (both complex multiplication and complex addition) in using N – point FFT algorithm.
14. What do you mean by in – place computation?
15. Differentiate between DIT and DIF FFT algorithm.
16. Write DFT pair of equation
17. List any four properties of DFT.
18. Compute DFT of x(n) = {1, -1, 1, -1}
19. Calculate % saving in computing through radix – 2, DFT algorithm of DFT coefficients. Assume N = 512.
20. Find the value of WNK when N = 8 and K = 2 and also k = 3
21. What are the advantages of FIR filters?
22. What are the desirable characteristics of windows?
23. Define Phase Delay and Group Delay.
24. Draw the Direct form I structure of the FIR filter.
25. Compare FIR and IIR digital filter
26. Draw the ideal gain Vs frequency characteristics of HPF and BPF.
27. What is Gibb’s phenomenon?
28. Write the steps involved in FIR filter design.
29. List out the different forms of structural realizations available for realizing a FIR system.
30. Use the backward difference for the derivative and convert the analog filter to digital filter given H(s)=1/(s2 +16)
31. State the relationship between the analog and digital frequencies when converting an analog filter using bilinear transformation.
32. Explain the advantage and drawback of Bilinear transformation
33. Explain the term “ wrapping effect”
34. Find the transfer function for normalized butterworth filter of order 1 by determining the pole values.
35. Find digital filter equivalent for H(s)=1/(s+8)
36. Sketch the mapping of s – plane and z – plane in bilinear transformation.
37. Represent decimal number 0.69 in fixed point representation of length N = 6
38. What is Vocoder.
39. What are the different formats of fixed point representation?
40. State a few applications of adaptive filter