SRM University 2007 B.Tech Electronics and Communications Engineering BANK Digital Signal Processing - Question Paper

| H(w)| = 0.24 ; 0.5? = w = ?

Design a Chebyshev digital filter using bilinear transformation.


Unit- III
PART-A

1. What is multirate digital signal processing?
2. Write the various applications of multirate DSP
3. What is downsampling?
4. What is upsampling?
5. What is anti-aliasing and anti-imaging filter?
6. What is the need for sampling rate conversion?
7. Obtain the decimated signal y(n) by a factor 3 from the input signal x(n) = { 1,3,5,2,9,11,12,13,14}
8. Obtain the 2 fold expanded signal y(n) of the input signal x(n)
x(n) = n , n>0
0 , otherwise
9. What is meant by aliasing? How aliasing can be avoided?
10. Draw the block diagram of multirate stage decimator and interpolator
11. What are the drawbacks in Multistage filter implementation
12. What is QMF filter?
13. What are digital filter banks? provide a few application where these filter banks are used
14. What is meant by subband coding?
15. What is adaptive signal processing? provide its applications.
16. What is an adaptive filter? provide its advantages.

PART-B
1. With a neat block diagram discuss decimation by a factor D of sampling rate conversion technique.
2. With a neat block diagram discuss interpolation by a factor I of sampling rate conversion technique.
3. With a neat block diagram discuss about sampling rate conversion by a factor I/D.
4. Explain with neat diagram the direct form realization of FIR filter in sampling rate conversion by a factor I/D.

5. For the subsequent multirate digital signal processing system determine the output y(n) in-terms of input x(n).

6. Write short notes on
(i) Subband speech coder (ii) Quadrature Mirror Filter
7. Write short notes on
(i) Digital filter Banks (ii) Quadrature Mirror Filter
UNIT - IV
Part – A
1. Define periodogram.
2. What is periodogram smoothing?
3. What are random signals?
4. What is auto-correlation?
5. What is cross correlation?
6. What is energy spectral density?
7. Define Parseval’s theorem.
8. Estimate the auto correlation sequence for x (n) = {1, 2, -1, 3}.
9. Difference ranging from energy & power signals.
10. Give the relation ranging from autocorrelation and power spectral density.
11. 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. Describe the methods for computing the energy density spectrum of a signal x(t) from its samples x(n).
4. What is periodogram smoothing? discuss.
5. What is power spectrum estimation? define the use of DFT in power spectrum estimation.
6. Compute the sutocorrelation and power spectral density for the signal
x(t) = K cos(2?Ft + ? ), where K and F are constants. ? is a random variable which is uniformly distributed over the interval (-?, ? ).
Unit – V
Part – A
1. What are the various buses of TMS320C5X and their functions?
2. List the different registers need with the ARAU and their functions.
3. What is meant by memory mapped register? How is it various from a memory?
4. List status register bits of 5X and their functions.
5. List the functional units in CALU of 5X.
6. Explain about parallel logic unit.
7. Distinguish ranging from the dual – access RAM and single – access RAM used in the on-chip memory of 5X.
8. List the on-chip peripherals in 5X.
9. What are the different interrupt kinds supported by 5X?
10. What are the 2 interrupt registers available in C5X?
11. Explain the direct addressing mode of C5X with examples.
12. Explain the immediate addressing mode of C5X with examples.
13. What are the various ways in which the auxiliary register pointer can be updated in 5X?
14. Write a note on circular addressing mode.
15. Give a brief account of the load / store instructions of 5X.
16. Explain the addition & subtraction instructions of C5X.
17. Explain the use of the interrupt mask register of C5X.
18. Explain the use of interrupt flag register of C5X.
19. What are the various move and block move instructions in C5X?
20. Give any 4 branch and call instructions.
21. Give any 4 delayed branch and call instruction.
22. Explain about repeat instruction in C5X.
23. What are the 4 phases of C5X pipeline operation?
24. What do you mean by pipeline conflicts?
25. Explain push & pop instructions.
26. List the peripheral control instructions.
27. Explain MAC instruction.
28. Explain MACD instruction.
29. Give any 4 multiplication instructions.
30. Give any 4 shift & logical instructions with example.
31. What is the function of NORM instruction?

Part – B
1. Explain the internal architecture of C5X processor with neat diagram.
2. Explain the central processing unit of C5X processors with neat diagram.
3. Explain about on-chip memory unit in C5X processor with neat diagram.
4. Explain about the on-chip peripherals current in C5X processor.
5. What are the various addressing modes supported by C5X processor? discuss every 1 of them with an example.
6. Explain the pipeline operation & pipeline conflicts C5X processor.
7. Write an assembly language program in C5X to perform addition of 2 16 bit numbers using immediate and direct addressing modes.
8. Write an assembly language program in C5X to perform subtraction of 2 16 bit numbers using immediate and direct addressing modes.
9. Write an assembly language program in C5X to perform multiplication of 2 16 bit numbers using MPY instruction.
10. Write an assembly language program in C5X to perform division of 2 16 bit numbers with push and pop instructions using indirect addressing mode.

Earning:   Approval pending.