Dear Students ,
Find the question bank for 4,5 units below......
Question
Bank (UNIT-4,5)
Sub: EC6502-PDSP SEM:V
PART -A
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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.
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4.
What are the methods used to prevent overflow?
5.
Compare truncation with rounding errors.
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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
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8.
Compare the fixed point and floating point number
representations?
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9.
Why Rounding is preferred over truncation in realizing the digital
filter
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10. State the need
for scaling in filter implementation
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11. Define Adaptive
filter?
12. Write the input
output relationship for a decimator
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13. State the
applications of adaptive filtering?
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14. Write the expression for the output y(n) as a function of input
x(n) for the given Multirate system shown below
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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
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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
