MU Electronics Engineering (Semester 8)
Mobile Communication
December 2012
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 features of CDMA
5 M
1(b) Explain the factor influencing small scale fading
5 M
1(c) Compare cordless telephony, paging system and cellular system
5 M
1(d) Discuss power control in 3G system
5 M

2(a) List and explain various methods to improve the cell capacity
10 M
2(b) Explain frame structure used in GSM
10 M

3(a) Compare TDMA, CDMA, FDMA and SDMA
10 M
3(b) Explain GSM speech processing in detail
10 M

4(a) Explain the major 3G RTT proposals
10 M
Define the following :-
4(b)(i) Discontinuous transmission
5 M
4(b)(ii) Subscriber Identity Module (SIM)
5 M

5(a) Discuss handoff procedure in CDPD with neat sketch
10 M
5(b) Derive the relationship between S/I (signal to Interference) and cluster size N
10 M

6(a) With a neat diagram, explain forward CDMA channel
10 M
6(b) Explain an impulse response model of a multipath channel
10 M

Write short notes on :-
7(a) Diversity methods
5 M
7(b) Umbrella cell approach
5 M
7(c) Types of mobile data networks
5 M
7(d) Channel assignment strategies
5 M



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