Wireless Communication - Dec 2013

Electronics & Communication (Semester 8)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) Explain briefly the evolution of different generation of cellular systems.(10 marks) 1 (b) With a neat timing diagram, explain the AMPS hand-off operation.(10 marks) 2 (a) With the help of net block diagram, explain the working of a subscriber device.(8 marks) 2 (b) Explain the function of VLR, HLR and MSC.(6 marks) 2 (c) Explain the subscriber device identification parameters.(6 marks) 3 (a) What factors determine frequency re-use distance?(4 marks) 3 (b) Explain the different power saving schemes.(6 marks) 3 (c) Discuss the different capacity expansion technique in cellular communication.(10 marks) 4 (a) With a neat schematic explain the working of GSM network and system architecture.(10 marks) 4 (b) Discuss with the help of a neat diagram the working of signalling model also explain the different protocols.(10 marks) 5 (a) What is MSRN? What is the purpose of MSRN? Explain the GSM call set-up using the MSRN.(10 marks) 5 (b) With a neat diagram explain:
i) GSM service request operations.
ii) GSM authentication operations.(10 marks) 6 (a) With a neat diagram, explain the element of the CDMA 2000 packet core network.(10 marks) 6 (b) Explain the generation of the CDMA paging channel signal.(10 marks) 7 (a) Why is the free space path loss model in-appropriate to apply to wireless cellular operation?(4 marks) 7 (b) Describe FHSS and DSSS operation.(8 marks) 7 (c) If a certain CDMA radio base station can output a 50 watt carrier signal, how much power is on the pilot channel? How much power on the synchronization channel.(8 marks) 8 (a) Discuss the design issues of IEEE 802.11 and also provide the working of BDS, DS and ESS networks.(10 marks) 8 (c) Describe the basic wireless MAN.(4 marks) 8 (c) Describe the differences between WLAN and WPAN.(6 marks)