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INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) Explain forward link features of CDMA 2000.
4 M
1 (b) Explain concept of HSDPA with respect of WCDMA.
4 M
1 (c) What is adaptive multiratecoding?
4 M
1 (d) Give different WLAN topologies.
4 M
1 (e) Explain the concept of OFDM.
4 M

2 (a) Explain in detail components of sensor node.
10 M
2 (b) Explain in detail various IEEE 802.11 standard used in wireless Network.
10 M

3 (a) Differentiate between: (i) CDMA 2000 and WCDMA.
(ii) IS-95 and CDMA 2000
10 M
3 (b) Calculate the downlink cell load-factor and number of voice users per cell for a WCDMA system using the following data -
- Information rate (Ri) = 12.2 kbps
- Chip Rate(Rc) = 3.84 Mcps
- Required Eb/Nt = 4dB
- Average interference factor due to other cells = 0.5
- Orthogonal factor = 0.6
- Interference margin = 3db.
10 M

4 (a) Give UMTS Air-interface specifications. Also explain 3 types of channels defined in UMTS.
10 M
4 (b) Explain Bluetooth protocol stack.
10 M

5 (a) Describe the forward and reverse link physical channels for CDMA 2000.
10 M
5 (b) Explain WLAN technologies in detail.
10 M

6 (a) Discuss in detail WAP programming model.
10 M
6 (b) Using the following data for GSM1800, develop downlink and uplink budgets and determine the cell radius.
- Base station transmit power (Pb) = 36 dBm = 4W
- Mobile station transmit power (Pm) = 24 dBm
- Mobile station (hand-held unit) noise figure = 8 dB
- Base station noise figure = 5 dB
- Base station transmit and receive antenna gain (GA) = 18 dBi
- Mobile antenna gain = 0 dBi
- Required signal-to-noise ratio (SNR) = 12 dB
- BS transmit antenna cable, connector, and filter losses (Lc) = 5 dB
- BS receiver antenna cable, connector, and filter losses (Lc) = 2 dB
- Orientation/body losses at mobile = 3 dB
- Thermal noise density = -174 dBm/Hz
- Antenna diversity gain at BS = 5 dB
10 M

Write shorts notes on the following:-
7 (a) Wimax.
10 M
7 (b) Zigbee protocol.
10 M

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