Download PTU B.Tech 2021 Jan ECE 5th Sem 78757 Analog And Digital Communication Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January ECE 5th Sem 78757 Analog And Digital Communication Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ECE) (Sem.?5)
ANALOG AND DIGITAL COMMUNICATION
Subject Code : UC-BTEC-501-18
M.Code : 78757
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 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
Write briefly :
1)
Differentiate between analog and digital signals.
2)
What is the significance of carrier in modulation?
3)
Draw the frequency spectrum of DSB-SC signal.
4)
Enlist various types of noise in communication channel.
5)
What do you mean by Unit impulse function?
6)
Differentiate between FDM and TDM.
7)
Explain aperture effect.
8)
Define slope overload distortion in delta modulation.
9)
What are the digital modulation formats?
10) What are the advantages of MSK?
1 | M - 7 8 7 5 7
( S 2 ) - 3 7 9

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SECTION-B
11) Derive the expression for AM wave.
12) Explain the sampling process and its various steps in detail.
13) Explain Adaptive Delta Modulation in detail.
14) Describe the noise in frequency modulation.
15) Draw and describe continuous phase modulation.
SECTION-C
16) Explain the generation and detection of VSB wave.
17) Draw and explain working of adaptive delta modulation.
18) Describe the generation and detection of QPSK.
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.
2 | M - 7 8 7 5 7
( S 2 ) - 3 7 9

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