Mobile Communication - May 2013

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 the various nonlinear effect in FDMA(5 marks) 1(b) Explain fast associated and slow associated control channels in GSM(5 marks) 1(c) What is umbrella cell approaches?(5 marks) 1(d) Explain variable data rate transmission in CDMA(10 marks) 2(a) Discuss IMT 2000 system(10 marks) 2(b) With neat diagram, explain reverse CDMA channel(10 marks) 3(a) Draw and explain GPRS architecture(10 marks) 3(b) Explain with neat diagram mobility management in CDPD(10 marks) 4(a) Explian signal processing in GSM. What is the use of interleaver?(10 marks) 4(b) Explain handoff and power control in 3G system(10 marks) 5(a) Discuss forward W-CDMA channel(10 marks) 5(b) Compare SDMA, TDMA, FDMA and CDMA(10 marks) 6(a) Derive relationship between S/I (signal to interference ratio) and cluster size N(10 marks) 6(b) For the two-ray ground reflection model, derive the expression for received power at a distance 'd' from the transmitter(10 marks)

Write short notes on(any two):-

7(a) Sectoring in GSM(10 marks) 7(b) Knife edge diffraction model(10 marks) 7(c) Effect of Doppler spread on fast fading and slow fading(10 marks)