Download GTU BE/B.Tech 2018 Winter 6th Sem New 2161704 Analog And Digital Communication Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem New 2161704 Analog And Digital Communication Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2161704 Date:27/11/2018

Subject Name:Analog and Digital communication

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS

Q.1 (a) Explain adaptive delta modulation. 03
(b)
Define amplitude modulation and modulation index. Derive relation between the
output power of an AM transmitter and depth of modulation.
04
(c) What do you mean by network topology? Explain different types of network
topology in detail.
07

Q.2 (a) Draw the block diagram of communication system and explain each block. 03
(b) Explain DTE and DCE equipments. 04
(c) Explain in brief different types of noise. 07
OR
(c) Describe frequency modulation and give its mathematical representation. 07
Q.3 (a) Explain parity error detection method. 03
(b) Explain the losses in the fiber optic cable. 04
(c) Explain bit-oriented protocols. 07
OR
Q.3 (a) Explain Pulse Code Modulation. 03
(b) Explain LRC and VRC error detection method along with suitable example. 04
(c)
For a stream of data 11001010001, show the different encoded data formats in
UNZ,URZ,BNZ-AMI, BRZ-AMI, Manchester( Biphase ) and Differential
Manchester codes
07
Q.4 (a) Explain IEEE 802.6 Metropolitan Area Network. 03
(b) Explain wireless LANs using CSMA/CA (IEEE 802.11) 04
(c) Describe OSI Model in detail. 07
OR
Q.4 (a) Explain Wave Division Multiplexing. 03
(b) Explain Optical Detector in detail. 04
(c)
Describe RS232C interface standard and draw its null modem configuration.
07
Q.5 (a) Explain IEEE 802.3 Ethernet frame. 03
(b) Explain QPSK Modem in detail. 04
(c) Explain Time Division Multiplexing. Also discuss about multichannel TDM
system.
07
OR

Q.5 (a) Explain Microwave communication in detail. 03
(b) Write a short note on SONET. 04
(c) Explain different methods of Satellite Communications. 07

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