SRM University 2007 B.Tech Electronics and Communications Engineering BANK : EC303 – DIGITAL SIGNAL PROCESSING - Question Paper

14. What is meant by aliasing? How aliasing can be avoided?
15. The signal x(n)is described by x(n) ={ an , n>0
0 ,otherwise
find the decimated signal with a factor of 3
16. For the signal x(n) provided in the above question(Q.no15),obtain the
interpolated signal with a factor of 3
17. Draw the block diagram of Multirate stage decimator and interpolator
18. Draw the block diagram of a general poly phase frame work for
decimator and interpolator
19. Draw the signal flow graph of a system represented by the input, output
relationship y(n) = 3x(n) +5x(n-1) – 4x(n-2) – 6y(n-2)
20. What is the need for Multistage filter implementation
21. elaborate the drawbacks in Multistage filter implementation
22. find the poly phase structure of the filter with the transfer function
H(Z) = 1-3 Z-1 / 1+4Z-1
23. elaborate the advantages of poly phase decomposition
24. What is QMF filter
25. elaborate the errors in QMF filter bank
26. elaborate digital filter banks. provide a few application where these filter
banks are used
27. What is meant by subcoding?
28. List the various methods of speech coding techniques
29. What is meant by signal compression
30. What is the function of channel Vocoder
31. List the various kinds of channel Vocoder

PART-B
1. Explain in detail about Multirate Digital signal processing
2. Explain with the block diagram, the general poly phase framework for interpolator and decimator
3. With neat block diagram discuss about subcoding
4. Explain QMF filter bank
5. Explain about various applications of Multirate digital signal processing
6. Explain about sampling rate conversion by a factor I/D
7. Explain the poly phase decomposition for
(i) FIR filter structure
(ii) IIR filter structure

UNIT - IV

Part – A

1. Define periodogram.
2. What is periodogram smoothing?
3. What is random signals?
4. What is auto-correlation?
5. What is cross correlation?
6. What is energy spectral density?
7. Give the properties of auto correlation.
8. Define Parseval’s theorem.
9. Give the properties of power spectral density.
10. What is sample auto correlation?
11. Estimate the auto correlation sequence for x (n) = {1, 2, -1, 3}.
12. Difference ranging from energy & power signals.
13. What are the 2 kinds of power spectrum estimation?
Part – B
1. Describe the power spectrum estimation of random process using the periodogram method.
2. Explain briefly about the consistent estimate of power spectrum.
3. Give the applications of power spectrum estimation.
4. Give the properties of the periodogram.
5. What is periodogram smoothing? And discuss.
Unit – V
Part – A
1. Mention few applications of every of the families of TI DSPs.
2. What are the various buses of TMS320C5X and their functions?
3. List the different registers need with the ARAU and their functions.
4. What is meant by memory mapped register? How is it various from a memory?
5. List status register bits of 5X and their functions.
6. List the functional units in CALU of 5X.
7. Explain about parallel logic unit.
8. Distinguish ranging from the dual – access RAM and single – access RAM used in the on-chip memory of 5X.
9. List the on-chip peripherals in 5X.
10. What are the different interrupt kinds supported by 5X?
11. What are the 2 interrupt registers available in C5X?
12. Explain the direct addressing mode of C5X with examples.
13. Explain the immediate addressing mode of C5X with examples.
14. What are the various ways in which the auxiliary register pointer can be updated in 5X?
15. Write a note on circular addressing mode.
16. Give a brief account of the load / store instructions of 5X.
17. Explain the addition & subtraction instructions of C5X.
18. Explain the use of the interrupt mask register of C5X.
19. Explain the use of interrupt flag register of C5X.
20. What are the various move and block move instructions in C5X?
21. Give any 4 branch & call instructions.
22. Give any 4 delayed branch & call instruction.
23. Explain about repeat instruction in C5X.
24. What are the 4 phases of C5X pipeline operation?
25. What do you mean by pipeline conflicts?
26. Explain push & pop instructions.
27. List the peripheral control instructions.
28. Explain MAC instruction.
29. Explain MACD instruction.
30. Give any 4 multiplication instructions.
31. Give any 4 shift & logical instructions with example.
32. What is the function of NORM instruction?

Part – B

1. Explain the difference ranging from Von Neumann and Harvard architecture for the computer. Which architecture is preferred for DSP applications and why?
2. Explain the internal architecture of C5X processor with neat diagram.
3. Explain the central processing unit of C5X processors with neat diagram.
4. Explain about on-chip memory unit in C5X processor with neat diagram.
5. Explain about the on-chip peripherals current in C5X processor.
6. What are the various addressing modes supported by C5X processor? discuss every 1 of them with an example.
7. Explain the various kinds of instructions current in C5X processor.
8. Explain the pipeline operation & pipeline conflicts C5X processor.
9. Write an assembly language program in C5X to perform convolution of 2 sequences.
10. Write an assembly language program in C5X to 1+2 + three +……… + N.

















ques. BANK

EC303 – DIGITAL SIGNAL PROCESSING

Earning:   Approval pending.