Question 1
(a)
Explain the Evolution of Mobile Communication.
3 Marks
(b)
Design 802.11 architecture of an ad-hoc network.
4 Marks
(c)
Explain type of generation (3G, 4G and 5G) used in wireless system with its advantages and disadvantages.
7 Marks
Gujarat Technological UniversityWinter 2025 Examination
GTU 3171608 Wireless Communication Winter 2025 Paper Solution & PDF
B.E. · IT Engineering · Semester 7 · Subject Code: 3171608
Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours10:30 AM – 1:00 PM
Paper Structure5 QuestionsWith internal OR choices
Question 2
(a)
Why we use hexagon shape in cell structure? Give the proper reason.
3 Marks
(b)
Define following terms:
1)Page,
2)Half-duplex systems,
3)Cluster
4)Transceiver
4 Marks
(c)
Discuss the fixed channel allocation, Channel borrowing and dynamic channel allocation techniques in cellular systems.
7 Marks
OR OPTION
(c)
Explain how we increase cluster size and cell capacity in cellular network.
7 Marks
Question 3
(a)
Differentiate NLOS and LOS systems.
3 Marks
(b)
Explain handoff process and dwell time.
4 Marks
(c)
A spectrum of 33 MHz is allocated to a wireless FDD cellular system which uses two 25 kHz simplex channels to provide full duplex voice and control channels. Compute the number of channels available per cell if a system uses
i)4-cell reuse
ii)7-cell reuse and
iii)12-cell reuse.
7 Marks
OR OPTION
(a)
Illustrate the concept of diffraction.
3 Marks
(b)
Briefly explain different types of propagation models.
4 Marks
(c)
List out various outdoor propagation models & explain any one in brief.
7 Marks
Question 4
(a)
What is CSMA Protocols? Explain briefly.
3 Marks
(b)
Differentiate/ Compare TDMA, FDMA and CDMA
4 Marks
(c)
What is ZigBee? Explain in details ZigBee networks using suitable diagrams.
7 Marks
OR OPTION
(a)
Define: 1-persistent CSMA, non-persistent CSMA, p-persistent CSMA.
3 Marks
(b)
Illustrate TDMA scheme with necessary equations.
4 Marks
(c)
Explain FDMA and OFDM with example.
7 Marks
Question 5
(a)
Explain the concept of RAKE receiver in CDMA.
3 Marks
(b)
Differentiate: CDMA technology and GSM technology.
4 Marks
(c)
Define GPRS. Explain it with its architecture.
7 Marks
OR OPTION
(a)
Define following terms:
1)BSC,
2)MSC
3)VLR
3 Marks
(b)
Compare Wi-Fi and Wi-max technology.
4 Marks
(c)
Write Short note on Security issues and challenges in a Wireless network.
7 Marks
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About this Examination Paper & Attribution
Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Wireless Communication (Winter 2025, B.E. · IT Engineering, Sem 7). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.