Mobile Communication - Dec 2012

Electronics & Telecomm. (Semester 7)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1(a) Explain features of CDMA(5 marks) 1(b) Explain the factor influencing small scale fading(5 marks) 1(c) Compare cordless telephony, paging system and cellular system(5 marks) 1(d) Discuss power control in 3G system(5 marks) 2(a) List and explain various methods to improve the cell capacity(10 marks) 2(b) Explain frame structure used in GSM(10 marks) 3(a) Compare TDMA, CDMA, FDMA and SDMA(10 marks) 3(b) Explain GSM speech processing in detail(10 marks) 4(a) Explain the major 3G RTT proposals(10 marks)

Define the following :-

4(b)(i) Discontinuous transmission(5 marks) 4(b)(ii) Subscriber Identity Module (SIM)(5 marks) 5(a) Discuss handoff procedure in CDPD with neat sketch(10 marks) 5(b) Derive the relationship between S/I (signal to Interference) and cluster size N(10 marks) 6(a) With a neat diagram, explain forward CDMA channel(10 marks) 6(b) Explain an impulse response model of a multipath channel(10 marks)

Write short notes on :-

7(a) Diversity methods(5 marks) 7(b) Umbrella cell approach(5 marks) 7(c) Types of mobile data networks(5 marks) 7(d) Channel assignment strategies(5 marks)