MU Electronics Engineering (Semester 8)
Mobile Communication
May 2014
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Explain umbrella cell concept in cellular system.
5 M
1 (b) Explain GSM services and features
5 M
1 (c) What are the factors influencing small scale fading.
5 M
1 (d) Disuss about non-linear effects in CDMA
5 M

2 (a) Explain how does 60o and 120o sectoring improves signal to interference ratio
10 M
2 (b) Explain diversity methods used in cellular system
10 M

3 (a) Explain signal processing in GSM. What is use of interleaver?
10 M
3 (b) Explain frame structure used in GSM.
10 M

4 (a) Explain traffic channel, control channel, broadcast channel and common control channel in GSM
10 M
4 (b) Give a complete functional account on NSS
10 M

5 (a) Describe open loop and close loop system of power control in CDMA
10 M
5 (b) With neat diagram explain reverse CDMA channel
10 M

6 (a) Elaborate on forward w-CDMA channel.
10 M
6 (b) Explain the major 3G RTT proposal
10 M

Short notes (any two) :-
7 (a) Rake receiver
10 M
7 (b) GPRS technology
10 M
7 (c) IMT 2000 Concept.
10 M



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