Wireless Communication 2018 Question Paper — Government College of En…
The 2018 Wireless Communication previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Wireless Communication
- Course: Wireless Communication
- Branch: Electronics & Communication Engineering
- Year: 2018
- Paper: supplementary
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt five questions in all selecting at least two questions from each Section.
- Each question carries 20 marks.
Questions
Section-A
- QQ1(a). What are the advantages of cellular system over conventional mobile service. Why hexagonal geometry is used for cellular system. [10 marks]
- QQ1(b). What is Hand-Off. How is it achieved? [10 marks]
- QQ2(a). If a total of 33MHz of bandwidth is allocated to a particular FDD cellular system with 25KHz simplex channel to provide full duplex communication. Compute the number of channels available with four cell and seven cell reuse. If 1 MHz is reserved for control channels, determine an equitable distribution of voice and control channels. [5 marks]
- QQ2(b). What is co- channel interference and adjacent channel interference? [5 marks]
- QQ2(c). What are the different techniques used for increasing the system capacity. Explain Sectoring in detail. [10 marks]
- QQ3(a). What are the causes for small scale fading [10 marks]
- QQ3(b). For a line of sight scenario, what small scale propagation model should be used. Explain the model in brief [10 marks]
- QQ4(a). What is the difference between large scale and small scale fading. What are different types of small scale fading due to Time delay spread [10 marks]
- QQ4(b). Explain the terms : Co-herence Bandwidth, Co-herence Time , rms delay spread and Doppler shift [10 marks]
Section B
- QQ5(a). What is Diversity and what is its need [5 marks]
- QQ5(b). Explain space Diversity processing techniques in detail. [15 marks]
- QQ6(a). Differentiate between static and dynamic channel allocation. [5 marks]
- QQ6(b). Give features of TDMA and also discuss its efficiency [10 marks]
- QQ6(c). What is CDMA. Explain difference between narrowband and wideband CDMA. [5 marks]
- QQ7. Explain $\pi/4$ QPSK in detail with the aid of signal space diagram. What advantage does it have over QPSK system [20 marks]
- QQ8(a). Explain architecture of GSM system with aid of block diagram. [10 marks]
- QQ8(b). Write a note on reverse channels of CDMA system. [10 marks]
Related pages
Other years
- Wireless Communication 2018 question paper — end-term
- Wireless Communication 2018 question paper — end-term