Exam Details
| Subject | wireless communication | |
| Paper | ||
| Exam / Course | pddc | |
| Department | ||
| Organization | Gujarat Technological University | |
| Position | ||
| Exam Date | May, 2019 | |
| City, State | gujarat, ahmedabad |
Question Paper
1
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
ME SEMESTER EXAMINATION WINTER 2019
Subject Code: 3710508 Date: 08/05/2019
Subject Name: Wireless and Mobile 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.
Q.1
Explain the problem associated during handoff process for high speed users and slow speed users. Also explain solution for the same.
07
Write call flow sequence for location updating in GSM.
04
What is the role of control channels in GSM? List out various GSM control channels.
03
Q.2
If a 1mW transmitter at 6GHz is fed into the transmitting horn antenna then the line of sight transmission link limits the separation of transmitter and receiver at about 40km. The transmitting and receiving antenna has effective aperture of 20m2.
Calculate free space path loss in dB.
Find the received power in dBm.
04
Compute the mean excess delay and maximum excess delay (10dB) for given power delay profile.
03
List out various outdoor propagation models and explain one of them in detail.
07
OR
Briefly explain types of small scale fading.
07
Q.3
What is the role of equalizer in communication system? Briefly explain adaptive equalizer.
07
List out various space diversity reception methods and explain any one of them in detail.
07
OR
Q.3
What is the difference between linear and nonlinear equalizer? Briefly explain working of Maximum Likelihood Sequence Estimation (MLSE) equalizer.
07
Write short note on RAKE Receiver.
07
2
Q.4
Draw and explain block diagram of OFDM transmitter and Receiver.
07
Write brief note on Massive MIMO system.
07
OR
Q.4
Explain Peak to Average Power Ratio (PAPR) problem in OFDM system. Also explain few methods to reduce this problem.
07
Briefly explain channel capacity in MIMO system.
07
Q.5
What is the difference between proactive and reactive routing? Write short note on Ad-hoc On Demand Distance Vector routing algorithm for Ad-hoc wireless network.
07
Write short note on 5G cellular communication system.
07
OR
Q.5
Define wireless sensor network? State comparisons between wireless sensor network and wireless Ad-hoc network.
07
Write short note on cognitive radio.
07
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
ME SEMESTER EXAMINATION WINTER 2019
Subject Code: 3710508 Date: 08/05/2019
Subject Name: Wireless and Mobile 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.
Q.1
Explain the problem associated during handoff process for high speed users and slow speed users. Also explain solution for the same.
07
Write call flow sequence for location updating in GSM.
04
What is the role of control channels in GSM? List out various GSM control channels.
03
Q.2
If a 1mW transmitter at 6GHz is fed into the transmitting horn antenna then the line of sight transmission link limits the separation of transmitter and receiver at about 40km. The transmitting and receiving antenna has effective aperture of 20m2.
Calculate free space path loss in dB.
Find the received power in dBm.
04
Compute the mean excess delay and maximum excess delay (10dB) for given power delay profile.
03
List out various outdoor propagation models and explain one of them in detail.
07
OR
Briefly explain types of small scale fading.
07
Q.3
What is the role of equalizer in communication system? Briefly explain adaptive equalizer.
07
List out various space diversity reception methods and explain any one of them in detail.
07
OR
Q.3
What is the difference between linear and nonlinear equalizer? Briefly explain working of Maximum Likelihood Sequence Estimation (MLSE) equalizer.
07
Write short note on RAKE Receiver.
07
2
Q.4
Draw and explain block diagram of OFDM transmitter and Receiver.
07
Write brief note on Massive MIMO system.
07
OR
Q.4
Explain Peak to Average Power Ratio (PAPR) problem in OFDM system. Also explain few methods to reduce this problem.
07
Briefly explain channel capacity in MIMO system.
07
Q.5
What is the difference between proactive and reactive routing? Write short note on Ad-hoc On Demand Distance Vector routing algorithm for Ad-hoc wireless network.
07
Write short note on 5G cellular communication system.
07
OR
Q.5
Define wireless sensor network? State comparisons between wireless sensor network and wireless Ad-hoc network.
07
Write short note on cognitive radio.
07
Subjects
- advance electronics
- advance power system - ii
- advanced fluid mechanics
- advanced power electronics – i
- advanced power system - i
- advanced structural analysis
- advanced surveying
- analog & digital electronics
- antenna & wave propagation
- audio video engineering
- basic electronics
- building and town planning
- cim
- circuits and networks
- commissioning of electrical equipments
- complex variables and partial differential equations
- computer aided design
- computer integrated manufacturing
- computer programming & utilisation
- concrete technology
- constitution of india
- construction
- control engineering
- control systems
- control theory
- data communication and networking
- design of hydraulic structures
- digital communication
- digital signal processing
- dock, harbour and airport engineering
- dynamics of machinery
- earthquake engineering
- effective technical communication
- electrical drives & traction
- electrical engineering
- electrical machine design i and ii
- electrical machine-iii
- electrical machines & electronics
- electrical machines i & ii
- electrical power
- electromagnetics theory
- electronic communication
- elements of electrical design
- elements of electrical engineering
- elements of mechanical and structural
- embedded system
- engineering electromagnetics
- engineering geology
- engineering thermodynamics
- environmental engineering
- fluid mechanics
- fluid power engineering
- foundation engineering
- heat and mass transfer
- high voltage engineering
- highway engineering
- hydrology and water resources engineering
- industrial engineering
- industrial instrumentation
- industrial safety and maintenance engineering
- integrated circuits and applications
- interconnected power systems
- irrigation engineering
- irrigation water management
- kinematics of machines
- machine design - ii
- machine design & industrial drafting
- machine design-i
- manufacturing process - i
- material science & metallurgy
- mechanical measurement & metrology
- mechanics of solids
- microcontroller and interfacing
- microprocessor & interfacing
- microwave engineering
- operation research
- optical communication
- power electronics
- power electronics-i
- power electronics-ii
- power plant engineering
- power system analysis and simulation
- power system practice and design
- power system protection
- probability, statistics and numerical methods
- professional practice & valuation
- railway, bridges and tunnels
- refrigeration and air conditioning
- satellite communication
- soil engineering
- structural analysis - i
- structural analysis - ii
- structural design - i
- structural design - ii
- surveying
- switchgear
- theory of electromagnetics
- theory of machines
- thermal engineering
- urban transportation system
- vlsi technology and design
- wireless communication