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Principle of Communications Question Paper - Dec 18 - Information Technology (Semester 3) - Mumbai University (MU)
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Principle of Communications - Dec 18
Information Technology (Semester 3)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
Attempt any four from the following.
1.a.
Draw and explain basic analog communication system.
(5 marks)
00
1.b.
Explain noise figure and derive friss formula.
(5 marks)
00
1.c.
Explain super heterodyne receiver.
(5 marks)
00
1.d.
How to generate PPM.
(5 marks)
00
1.e.
Explain FDM with neat diagram.
(5 marks)
00
2.a.
What is thermal noise? Derive the expression for root mean square voltage of thermal noise?
(6 marks)
00
2.b.
Explain shot noise.
(4 marks)
00
2.c.
Derive the AM expression and explain each term.
(10 marks)
00
3.a.
Explain ratio dectector with neat diagram.
(10 marks)
00
3.b.
State and prove sampling theorem.
(10 marks)
00
4.a.
Explain ADM transmitter and receiver with neat block diagrams.
(10 marks)
00
4.b.
Explain BPSK generation and detection with neat block diagrams.
(10 marks)
00
5.a.
Explain line coding with five data formats with examples.
(10 marks)
00
5.b.
What is image signal and how to reject it? Also define selectivity, sensitivity and fidelity of a receiver.
(10 marks)
00
Answer any four.
6.a.
Need for modulation.
(5 marks)
00
6.b.
State and prove time shifting property of Fourier transform.
(5 marks)
00
6.c.
Explain any method to generate SSB SC AM.
(5 marks)
00
6.d.
Digital communication with block diagram.
(5 marks)
00
6.e.
Explain BASK generation.
(5 marks)
00
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