Download GTU BE/B.Tech 2018 Winter 4th Sem Old 141102 Communication Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-IV (OLD) EXAMINATION - WINTER 2018

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Subject Code:141102 Date: 12/12/2018
Subject Name: Communication Engineering
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Discuss the need of communication. With block diagram explain the communication system.
(b) Define Noise. Classify the different types of noise.
Q.2 (a) What is Modulation and Demodulation? Explain need of Modulation.

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(b) List out the SSB generation methods and explain any one in detail.
OR
(b) Explain VSB Modulation in detail.
Q.3 (a) Write short note on Foster-Seeley Discriminator.
(b) Derive the Friss formula for overall noise factor of amplifiers in cascade.

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OR
Q.3 (a) Write short note on Superhetrodyne receiver.
(b) Discuss FM Modulation and Demodulation in detail.
Q.4 (a) Write short note on Telegraphy and Telemetry.
(b) What are the advantages of digital communication over analog communication? Draw and explain the block diagram of PCM system.

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OR
Q.4 (a) What do you mean by multiplexing? Discuss types of multiplexing techniques.
(b) Compare AM, FM, and PM.
Q.5 (a) Write short note on Television standards.
(b) Discuss losses occurs in fiber optic communication.

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OR
Q.5 (a) Discuss the advantage and disadvantage of optical fiber communication over wire communication.
(b) Draw and explain block diagram of monochrome TV system (transmitter and receiver).
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