question bank for 4,

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Find the question bank for 4,5 units below......

Question Bank (UNIT-4,5)

Sub: EC6502-PDSP                                                                                                  SEM:V

PART -A

1.      What are the different types of fixed point representation with example? 2.      What is meant by fixed point arithmetic? Write an example. 3.      Represent 15.75 using fixed point and floating point arithmetic.

4.      What are the methods used to prevent overflow? 5.      Compare truncation with rounding errors.

6.      What is meant by finite word Length effects in digital system? 7.      List out the factors degrading the performance of a finite word length digital filter

8.      Compare the fixed point and floating point number representations?

9.      Why Rounding is preferred  over truncation in realizing the digital filter

10. State the need for scaling in filter implementation

11. Define Adaptive filter? 12. Write the input output relationship for a decimator

13. State the applications of adaptive filtering?

14.  Write the expression  for the output y(n) as a function of input x(n) for the given Multirate system shown below

15. What is the need for Anti imaging filter after Up sampling signal? 16. How is sampling rate converted by a factor I/D? 17. . What is echo cancellation? 18. What is Quadrature Mirror Filter (QMF)? 19. What is sub-band coding? 20. Compare efficient transversal structure with direct form structure

PART –B

1. Explain the characteristics of Limit cycle oscillation with respect to system described by difference equation: y(n)=0.95y(n-1)+x(n); x(n)=0 and y(-1)=13                                                         

2. Explain coefficient quantization in IIR filter

3. Draw the product quantization noise model of second order IIR system.

4. Find the output round-off noise power for the system having transfer function H(z) = 1/(1-0.5Z^-1)( 1-0.4Z^-1) which is realized in direct and in cascade forms. Assume word length is 4 bits.

5. How does sampling rate increase by an integer factor I? Derive the input-output relationship in both time and frequency domains.

6. Briefly explain the following: (a) coefficient quantization error (b) Product quantization error (c) Truncation and Rounding

7. Design Two stage decimator for the following specifications Sampling  rate of the i/p signal=20kHz, M=100, pass band=0  to 40 Hz,  Transition band=40 to 50 Hz, PB ripple=0.01, SB ripple=0.002                                                  

8. Explain Sub Band coding in detail

9. Explain in detail about applications of adaptive filter for echo cancellation and equalization                                                                                                          

10. Explain Poly phase structure of the decimator and interpolator