Wt Paper By Vaze

Master of Computer Application Semester VI

Wireless Technology April 2007 Instructions: 1. Question No. 1 is compulsory and carries 20 marks 2. Attempt any four (4) from Q.2 to Q.7 Q Answer the following 1 (a) What is frequency hoping spread spectrum? What do you understand by slow and fast hoping? 1 (b) Explain the significance of (∆f /f) << 1. Explain the significance if it is not. Differentiate between Frequency Hoping Spread Spectrum and Direct Sequence Spread Spectrum 1 (c ) What is the relationship between D-AMPS and AMPS 2 (a) What are Block codes? And What are Convolutional codes? 2 (b) Define Hamming Distance. 2 (c) Differentiate between error correcting codes and error detecting codes. 3 (a) What do understand by: 1. Interleaving 2. Recursive and 3. Puncture 3 (b) What is Capacity Allocation in Frequency Division and Time Division? 4 (a) Write notes on IS-95. 4 (b) Write notes on G.S.M. 5 (a) Distinguish between ESS and BSS in IEEE 802.11 What is the purpose of NAV? 5 (b) Discuss the Physical Layer specifications in IEEE 802.11 6 (a) Describe Bluetooth applications architecture. What are Piconet and Scatternet? What is active state v/s parked state? 6 (b) Describe the protocol stack in Bluetooth. 6 (c ) What are the error correction and security schemes used in Bluetooth? 7 Write short notes on: 1. Wireless Security 2. The future of Wireless. 3. Security in GSM 4. L2CAP in Blue Tooth

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