Download PTU B.Tech 2021 Jan ECE 5th Sem 78758 Digital Signal Processing Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January ECE 5th Sem 78758 Digital Signal Processing Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ECE) (Sem.?5)
DIGITAL SIGNAL PROCESSING
Subject Code : UC-BTEC-502-18
M.Code : 78758
Time : 3 Hrs. Max. Marks : 60
INST RUCT ION TO CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1)
What is the importance of window technique?
2)
What do you mean by twiddle factor? Show how it is cyclic?
3)
What is the difference between auto correlation and cross correlation?
4)
What are energy and power signals?
5)
Explain low pass Chebyshev filter.
6)
A band pass signal extends from 1 KHz to 2 KHz. What is the minimum sampling
frequency needed to retain all information in the sampled signal?
7)
What is time shifting property of DFT?
8)
A continuous time signal y(t) = x(t2) is causal or non-causal.
9)
Find the zeros of h[n] = [n]+1/6 [n-1]-1/6 [n-2].
10) Find the z transform of x(n) = (n+3).
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SECTION-B
11) Write down the applications of DSP.
12) Discuss the various types of signals.
13) Draw the FIR Direct Form I structure and find its transfer function.
14) Find the cross-correlation for a discrete time system has x[n] = 2, 1, 3, 1 and h[n] = 1, 2, 2,
3.
15) Determine the Z-transform of the signal x(n) = (?1)n2(?n)u(n).
SECTION-C
16) Explain the architecture of TMS 320C6XX processor.
17) Write short note on :
a) Goertzel Algorithm
b) Limitations of analog processors.
18) Solve using 8-point DFT butterfly method x(n) = {1, 3, 2, 4, 1, 1, 2, 2}.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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