Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem New 2171004 Wireless Communication Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2171004 Date:16/05/2019
Subject Name:Wireless 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) Define: (1) Control Channel
(2) Mobile Switching Center
(3) Full Duplex Systems
03
(b) With figure explain Frequency Reuse concept in detail.
Define cluster size and write the equation for system capacity.
04
(c) Explain handoff scenario at cell boundary with figure. 07
Q.2 (a) Describe co channel interference and adjacent channel interference. 03
(b) Explain the concept of trunking and grade of service . 04
(c) Explain sectoring to improve coverage and capacity of a system. 07
OR
(c) Explain :(1) Cell splitting (2) Microcell Zone concept
To improve coverage and capacity of a system.
07
Q.3 (a) Explain three basic propagation mechanisms. 03
(b) Explain the factors influencing small scale fading. 04
(c) Explain ground reflection (Two-ray) Model with figure and derive the
equation for Electric Field E TOTAL.
07
OR
Q.3 (a) Explain Doppler Shift with equation. 03
(b) Explain small scale fading( based on time delay spread) 04
(c) Explain Spread spectrum channel impulse response measurement system
with diagram.
07
Q.4 (a) Explain Frequency Division Multiple Access(FDMA) in wireless
communication with figure.
03
(b) Explain small scale fading( based on Doppler spread) 04
(c) Explain direct RF channel impulse response measurement system with
diagram.
07
OR
Q.4 (a) If a total of 33 MHz of band width is allocated to a particular FDD cellular
telephone system which uses two 25 KHz simplex channels to provide full
duplex voice and control channels, compute the number of channel
available per cell if a system uses: (1) four cell reuse (2) seven cell reuse
and (3) 12 cell reuse
03
(b) Explain Time Division Multiple Access (TDMA) in wireless
communication with figure.
04
(c) Draw GSM system architecture and explain its working principle in detail. 07
Q.5 (a) Calculate the Brewster angle for a wave impinging on a ground having a
permittivity of ?r = 4
03
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2171004 Date:16/05/2019
Subject Name:Wireless 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) Define: (1) Control Channel
(2) Mobile Switching Center
(3) Full Duplex Systems
03
(b) With figure explain Frequency Reuse concept in detail.
Define cluster size and write the equation for system capacity.
04
(c) Explain handoff scenario at cell boundary with figure. 07
Q.2 (a) Describe co channel interference and adjacent channel interference. 03
(b) Explain the concept of trunking and grade of service . 04
(c) Explain sectoring to improve coverage and capacity of a system. 07
OR
(c) Explain :(1) Cell splitting (2) Microcell Zone concept
To improve coverage and capacity of a system.
07
Q.3 (a) Explain three basic propagation mechanisms. 03
(b) Explain the factors influencing small scale fading. 04
(c) Explain ground reflection (Two-ray) Model with figure and derive the
equation for Electric Field E TOTAL.
07
OR
Q.3 (a) Explain Doppler Shift with equation. 03
(b) Explain small scale fading( based on time delay spread) 04
(c) Explain Spread spectrum channel impulse response measurement system
with diagram.
07
Q.4 (a) Explain Frequency Division Multiple Access(FDMA) in wireless
communication with figure.
03
(b) Explain small scale fading( based on Doppler spread) 04
(c) Explain direct RF channel impulse response measurement system with
diagram.
07
OR
Q.4 (a) If a total of 33 MHz of band width is allocated to a particular FDD cellular
telephone system which uses two 25 KHz simplex channels to provide full
duplex voice and control channels, compute the number of channel
available per cell if a system uses: (1) four cell reuse (2) seven cell reuse
and (3) 12 cell reuse
03
(b) Explain Time Division Multiple Access (TDMA) in wireless
communication with figure.
04
(c) Draw GSM system architecture and explain its working principle in detail. 07
Q.5 (a) Calculate the Brewster angle for a wave impinging on a ground having a
permittivity of ?r = 4
03
2
(b) Explain Code Division Multiple Access (CDMA) in wireless
communication with figure.
04
(c) Consider a transmitter which radiates a sinusoidal carrier frequency of
1850 MHZ. For a vehicle moving 60 mile per hour, compute the received
carrier frequency if the mobile is moving (1) Directly toward the
transmitter
(2) directly away from the transmitter and
(3) in a direction which is perpendicular to the direction of arrival of the
transmitted signal.
07
OR
Q.5 (a) Explain: (1) static channel assignment strategy
(2) dynamic channel assignment strategy
03
(b) Write a short note on 3G W-CDMA(UMTS) 04
(c) With diagram explain various 2.5 G and 3G upgrade paths for the major
2G technologies.
07
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This post was last modified on 20 February 2020