B.E. Electronics & Telecommunication, Wireless Networks (WN), Semester 8, May 2012.

B.E. Electronics & Telecommunication,

Wireless Networks (WN), Semester 8, May 2012.

Con. 3964 – 12

GN - 7634

(REVISED COURSE)

(3 Hours)

[Total Mark: 100]

N.B. (1) Question No 1 is compulsory.

(2) Attempt any four questions out of remaining six questions.

(3) Draw neat sketches wherever required.

(4) Assume suitable data if required.

1. (a) Explain RAKE receiver in CDMA. ---- (5 Marks)

(b) Explain various states in Bluetooth system. ---- (5 Marks)

(c) Explain the concept of hidden and exposed terminals in WLAN. ----- (5 Marks)

(d) What is frequency reused concept in GSM? ---- (5 Marks)

2. (a) Explain in detail IS-95 forward and reverse channels in detail. ---- (5 Marks)

(b) Explain GSM architecture with a neat block diagram, highlighting all the interfaces. ---- (10 Marks)

3. (a) Draw and explain the architecture of WAP. ---- (10 Marks)

(b) Compare: ---- (10 Marks)

(i) WCDMA and CDMA 2000

(ii) IS – 95 and CDMA 2000

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)

(b) Explain in detail Bluetooth security features and security levels with proper diagrams. ---- (10 Marks)

5. (a) Explain Wireless Sensor Network Protocol Stack in detail. ---- (10 Marks)

(b) Explain the frame format in Bluetooth technology. ----- (10 Marks)

6.(a) Explain the following: ----- (10 Marks)

(i) WiMAX

(ii) HSPDA.

(b) Explain link budget analysis and requirements of wireless networks. ---- (10 Marks)

7. Write short notes on:- ----- (20 Marks)

(a) UMTS

(b) ZigBee Technology.