Download PTU B-Tech ECE 2020 Dec 5th Sem 70546 Digital Signal Processing Question Paper

Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (ECE)-Electronics And Communications Engineering 2020 December 5th Sem 70546 Digital Signal Processing Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ECE) (2012 to 2017 ) (Sem. ?5)
DIGITAL SIGNAL PROCESSING
Subject Code : BTEC-502
M.Code : 70546
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O 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 questio ns.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt ANY TWO questions .
SECTION-A
Write briefly :
1.
Verify whether the given system is linear or non-linear y (n ) = co s x(n ).
2 .
What is the difference between convolution and correlation?
3.
Give the significance of ROC in Z-transform.
4.
What do you mean by truncation and rounding errors?
5.
What do you mean by circular shift of a sequence?
6.
What do you mean `Twiddle Factor' of DFT & show how it is cyclic?
7.
Differentiate between FIR and IIR filter.
8.
What is frequency warping effect?
9.
What is the significance of barrel shifter?
10. Write any two features of DSP processor.
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SECTION-B
11. Explain different types of discrete time systems with examples.
12. Compute the linear convolution of the given sequences :
x (n) = [1, 2, 4]
h (n) = 1
fo r 1 n 1
2
for n 2
13. Obtain inverse Z-transform of
1
1
1
z
1
2
X ( Z )
| z |
1
2
2
1
z
4
14. Determine the Z-transform and sketch the ROC of :
x (n) = cos (0n) u (n)
15. Determine the direct form-I and direct form-II structure for the system described by the
system function
1
2
1 0.8z
0.15z
H (z)
1
2
1 0.1z
0.7 z
SECTION-C
16. With the help of N = 8, explain radix-2 decimation-in-time (DIT) FFT algorithm for
computation of DFT.
17. Explain in detail design methodologies impulse invariance and bilinear transformation for
the design of IIR filter.
18. The desired frequency response of a symmetric FIR filter is
0,

/ 6 / 6
H ()
d
j7
e
,
/ 6 | |
Stopband attenuation is > 40 dB
Determine the frequency response H (ej) using window method.
NOTE : Disclosure of identity by writing mobile number or making passing request on any
page of Answer sheet will lead to UMC case against the Student.
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