Download GTU BE/B.Tech 2019 Winter 4th Sem Old 141102 Communication Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 4th Sem Old 141102 Communication Engineering Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? IV (Old) EXAMINATION ? WINTER 2019
Subject Code: 141102 Date: 16/12/2019

Subject Name: Communication Engineering

Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Compare AM, FM and PM 07
(b) Explain how digital communication can reduce the noise. State and prove the
sampling theorem.

07

Q.2 (a) Explain need of modulation. Derive equation for amplitude modulation and draw
amplitude spectrum for m=1.
07
(b) Explain Armstrong method of FM generation. 07
OR
(b) What is SSB-SC modulation? Explain filter method of side band suppression. 07

Q.3 (a) Write short note on Superhetrodyne receiver. 07
(b) Explain the FDM System for telephone communication with the help of block
diagram
07
OR
Q.3 (a) Explain the quantization process used in PCM with figure 07
(b) Explain the principal of fiber optic data transmission and discuss advantages. 07

Q.4 (a) Derive the friss formula for overall noise factor of amplifiers in Cascade. 07
(b) Explain Terrestrial Microwave Links with example. 07
OR
Q.4 (a) Explain Station keeping for satellite. 07
(b) Draw and explain composite video signal. Explain each component. 07

Q.5 (a) Draw and explain a circuit diagram of IF section of TV receiver and explain it
briefly.
07
(b) Explain Terrestrial Microwave Links with example. 07
OR

Q.5 (a) Explain the need, advantages and disadvantages of coding. 07
(b) List color television standards. Discuss PAL-B standard 07

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