Gujarat Technological UniversitySummer 2026 Examination

GTU 3171608 Wireless Communication Summer 2026 Paper Solution & PDF

B.E. · IT Engineering · Semester 7 · Subject Code: 3171608
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Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours2:30 PM – 5:00 PM
Paper Structure5 QuestionsWith internal OR choices
Jump toQ1Q2Q3Q4Q5

Question 1

14 MarksMedium
(a)

Explain the concept of Wireless Local Area Network (WLAN).

3 Marks
(b)

What is the primary function of Bluetooth technology in personal area networks (PANs)?

4 Marks
(c)

Discuss the major trends in cellular radio and personal communication systems, highlighting advancements from the second generation (2G) to the fourth generation (4G).

7 Marks

Question 2

14 MarksMedium
(a)
What is the concept of frequency reuse in a cellular system?
3 Marks
(b)

Discuss the role of the Distance-to-Frequency Reuse Ratio in cellular systems and its impact on interference.

4 Marks
(c)

In a cellular system with a hexagonal cell layout, the distance between the centers of two cells using the same frequency is 6 km. If the cell radius is 2 km, calculate:

aThe frequency reuse factor (N).
bThe total number of cells that can be accommodated in a 100 km x 100 km area.
7 Marks
OR OPTION
(c)

A cell is divided into 6 sectors. If each sector requires 25 channels and the total number of channels available in the system is 300, calculate:

aThe number of cells that can be fully equipped with the given channels.
bThe number of channels allocated to each cell, assuming each cell is fully sectorized.
7 Marks

Question 3

14 MarksMedium
(a)
Briefly explain the concept of Rayleigh fading.
3 Marks
(b)

What is meant by 'multipath fading'? Discuss its impact on communication systems.

4 Marks
(c)
Explain the GSM Architecture
7 Marks
OR OPTION
(a)

What is the main difference between Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) path loss models?

3 Marks
(b)

Explain the concept of ‘shadowing’ and ‘scattering’ in radio propagation and its impact on signal strength.

4 Marks
(c)
Explain the GPRS Architecture
7 Marks

Question 4

14 MarksMedium
(a)

What is the primary difference between FDMA and CDMA in terms of how they manage channel access?

3 Marks
(b)

Describe the security mechanisms used in GSM to protect user data and ensure network security. Include authentication and encryption processes.

4 Marks
(c)
Describe the architecture of the IS-95 CDMA system.

Include the major components and their functions, and explain how they interact to provide mobile communication services

7 Marks
OR OPTION
(a)

Define TDMA and provide an example of its application in wireless communication.

3 Marks
(b)

Explain the concept of OFDM and its advantage over traditional multiple access techniques.

4 Marks
(c)

Describe the GSM handover process and its significance for maintaining seamless communication. Include the types of handovers and the key steps involved in the handover process.

7 Marks

Question 5

14 MarksMedium
(a)

What is the function of the CDMA reverse channel in a CDMA system?

3 Marks
(b)

Briefly describe the key characteristics of Wi-Fi and WiMAX technologies.

4 Marks
(c)

Explain the concept and benefits of Soft Handoff in CDMA networks. Discuss how it improves call quality and network reliability.

7 Marks
OR OPTION
(a)

What is the primary advantage of using CDMA2000 over IS-95

3 Marks
(b)

Explain the key differences between Wi-Fi and ZigBee in terms of their application areas and technology.

4 Marks
(c)

Compare and contrast WiMAX and UWB (Ultra- Wideband) technologies in terms of their applications, bandwidth capabilities, and communication range.

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 (Summer 2026, 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.

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