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Anna University Question Paper Code :6.3477
M.E. DEGREE EXAMINATION, MAY/JUNE 2014.
Second Semester
Embedded System Technologies
ET 7203 — WIRELESS AND MOBILE COMMUNICATION
(Regulation 2013)
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PART A (10 x 2 = 20 marks)
1. Calculate the charge in signal strengths (in dB) in free space propagation condition at two different distance points when the second distance point is twice the first distance point.
2. What is scattering of radio signal?
3. Give the significance of coherence time.
4. Define the term cell, foot print, cluster and frequency reuse distance in cellular system.. •
5. Define two peculiar situations where hand offs are necessary but cannot be made.
6. Define frame efficiency of a TDMA system.
7. List some of the • main responsibilities of the radio resource management sublayer of the network layer.
8. What is dead spot in a WLAN?
9. The IEEE 802.11 WLAN operates at 2 Mbps. Determine the data transfer time of a 20 k byte file. 10. Give the frequency band specification of a Riper LAN.
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