64235-mt----mobile communication systems
Content
Code No: 64235/MT
NR
M.Tech. – II Semester Regular Examinations, September, 2008 MOBILE COMMUNICATION SYSTEMS (Communication Systems) Time: 3hours Answer any FIVE questions All questions carry equal marks --1.a) b) 2.a) b) Describe different hand off strategies employed in cellular systems. Explain different methods for improving coverage and capacity in cellular systems. Discuss Free space propagation model used to predict received signal strength. If a transmitter produces 50W of power, express the transmit power in dBm. If 50W is applied at a unity gain antenna with a 900MHz carrier frequency, find the received power in dBm at a free space distance of 100m from the antenna. Assume unity gain for receiver antenna. Describe practical link budget design using path loss models. Compare various outdoor propagation models. Describe small scale multipath measurement techniques. Compare frequency hopped and direct sequence spread spectrum multiple access techniques. Explain carrier sense multiple access protocols. What is capture effect? Write a note on a) Wireless data services b) Common channel signaling. $$$ Max. Marks:60
3. 4. 5. 6. 7.a) b) 8.
NR
M.Tech. – II Semester Regular Examinations, September, 2008 MOBILE COMMUNICATION SYSTEMS (Communication Systems) Time: 3hours Answer any FIVE questions All questions carry equal marks --1.a) b) 2.a) b) Describe different hand off strategies employed in cellular systems. Explain different methods for improving coverage and capacity in cellular systems. Discuss Free space propagation model used to predict received signal strength. If a transmitter produces 50W of power, express the transmit power in dBm. If 50W is applied at a unity gain antenna with a 900MHz carrier frequency, find the received power in dBm at a free space distance of 100m from the antenna. Assume unity gain for receiver antenna. Describe practical link budget design using path loss models. Compare various outdoor propagation models. Describe small scale multipath measurement techniques. Compare frequency hopped and direct sequence spread spectrum multiple access techniques. Explain carrier sense multiple access protocols. What is capture effect? Write a note on a) Wireless data services b) Common channel signaling. $$$ Max. Marks:60
3. 4. 5. 6. 7.a) b) 8.
