My Profile
Active Members
TodayLast 7 Days
more...
Awards & Gifts
Online Exams
Fresher Jobs
Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian
cities including Bangalore, Chennai, Hyderabad, Pune or Kochi
Resources
Find educational articles, blogs, discussion threads and other resources.
Colleges
Find details about any college in India or search for courses.
|
Download Model question papers & previous years question papers
|
Posted By: CONFIDENCE IS THE COMPANION OF SUCCESS Member Level: Diamond Posted Date: 17 Apr 2008
|
2007 Anna University B.Tech Information Technology Digital Signal Processing Question paper
|
|
|
Model Question Paper
Time : 3 Hours Max. Marks : 100 marks
Answer all questions
PART – A (10 x 2 = 20 marks)
PART-A 10 x 2 = 20 Marks
1. Differentiate between analog and digital signal. Why Digital signal processing is widely used than analog signal processing.
2. State Shannon’s Sampling theorem.
3. Determine the Z-transform of (1/2)n[ u[n]-u[n-8]] and indicate its ROC.
4. Compare FIR and IIR filter.
5. What are the advantages of linear phase characteristics? Which systems exhibit linear phase?
6. Show that the system described by the difference equation is an all pass system
3 y(n) – y(n-1) = -x(n) + 3x(n-1)
7. Mention few application areas where speech coding is required.
8. Explain the circular addressing mode of DSP processor
9. Find the DFT of the signal x(n)= {1,3,5,7}.
10. Distinguish between recursive and non-recursive realizations of filters.
PART-B (5x16 = 80 Marks)
11.i) Show that Z-Transform of x*(n) is X*(z*). (4)
ii) Consider a linear shift-invariant discrete system with input x(n) and output y(n) for which
y(n-2) – 2.5 y(n-1) +y(n) =x(n)
By considering the pole-zero pattern associated with the difference equation, determine the three possible choices for the unit-sample response of the system. Comment on the stability of the system in each case. (12)
12.a)i) Find the DFT of the sequence {1,1,1,1,2,2,2,2} using radix-2 Decimation-in-Time FFT. Sketch the magnitude and phase plot. (12)
ii) What is the need for FFT? (4)
(OR)
12.b)i) Find the DFT of the sequence {1,1,1,1,2,2,2,2} using radix-2 Decimation-in-Frequency FFT. (12)
ii) Write about over lap save method. (4)
13.a) The specification of the desired low pass filter are:
Amin = 22 dB and Amax = 3 dB ?p = 0.2? and ?s = 0.4?
Design a Butterworth digital filter using Bilinear Transformation. (Amin and Amax are attenuation) (16)
(OR)
13.b) Design and also realize a high pass FIR filter with a cutoff frequency of 1.3 rad/sec and N=9. (16)
14.a)i) Perform the linear convolution of (1/4)n u(n) and (1/2)n u(n). (6)
ii) Is it possible to perform linear convolution through circular convolution. If so how?
(2)
iii) Find the Discrete Fourier Series of the following periodic sequence. (8)
(OR)
14.b)i) Explain about the Frequency Transformation that will be adopted in IIR filter design. (4)
ii) The specification of the desired low pass digital filter are
Amin = 12.4 dB and Amax = 0.915 dB ?p = 0.25? and ?s = -0.5?
Design a Chebyshev digital filter using impulse invariant transformation. (Amin and Amax are attenuation). (12)
15.ai) Highlight the special blocks of the Digital Signal Processor Architecture over the regular Micro-Controller based Architectures. (16)
(OR)
15.b)i) Explain how bit-reversal is achieved in the Texas based DSP Processor. (8)
ii) Show that FFT can be evaluated with lesser machine cycles using DSP processor compared to any of Micro-controller. (8)
Return to question paper search
|
|
|
Submit Previous Years University Question Papers and make money from adsense revenue sharing program
Are you preparing for a university examination? Download model question papers
and practise before you write the exam.
|
Watch TV Channels
Watch Asianet TV onlineKairali TV in InternetSurya TV onlineAmritha TV Channel
|