Wireless Network - May 2012

Electronics & Telecomm. (Semester 8)

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 RAKE receiver in CDMA.(5 marks) 1 (b) Explain various states in Bluetooth systems.(5 marks) 1 (c) Explain the concept of hidden and exposed terminals in WLAN.(5 marks) 1 (d) What is frequency reuse concept in GSM?(5 marks) 2 (a) Explain in detail IS-95 forward and reverse channels.(10 marks) 2 (b) Explain GSM architecture with a neat block diagram, highlighting all the interfaces.(10 marks) 3 (a) Explain and draw WAP architecture.(10 marks) 3 (b) Compare -
1. WCDMA and CDMA 2000.
2. IS-95 and CDMA 2000.(10 marks) 4 (a) "CDMA is an interference limited system". Give proper justification to support this statement. Also explain in short methods used for power control in CDMA environment. (10 marks) 4 (b) Explain in detail Bluetooth security features and security levels with proper diagram.(10 marks) 5 (a) Explain wireless sensor network protocol stack in detail.(10 marks) 5 (b) Explain the frame format in Bluetooth technology.(10 marks) 6 (a) Explain the following -
1. WiMAX.
2. HSPDA.(10 marks) 6 (b) Explain Link budget analysis and requirement of wireless network.(10 marks)

Write shorts notes on the following:-

7 (a) UMTS.(10 marks) 7 (b) Zigbee Technology.(10 marks)