Wireless Communication

1. (a) What is PN sequence? Discuss about the property of PN sequence and also draw a Block diagram to generate 15 length M sequence using flip flop. [8]

(b) Explain Transmitter and Receiver of DSSS with suitable diagram. [8]

1. (a) Explain Fast FHSS and Slow FHSS with an suitable example. [8]

(b) The data rate of a DS-CDMA product is fb = 10Kbps. The spreading rate or chip rate is Fc = 10mbps. How much is jamming margin (Mj) of an output (S/N) of 12 dB is required for a bit error rate (BER) of 10^-6 performance and given Lsgs = 2 dB is system implementation loss. [8]

2. (a) Discuss Free space loss shortly. Derive expression for free space loss in dB. [8]

(b) Explain Fresnel zone clearance. Find out radius of first Fresnel Zone clearance. [8]

2. (a) Derive Expression for effective earth radius. [8]

(b) Explain all multipath fading channels with their profile in details. [8]

3. (a) What are the principle of simplex, Half duplex and full duplex channels explain with Suitable example and diagram. [8]

(b) Differentiate TDMA, FDMA and CDMA with example. [8]

3. (a) What do you mean by PRMA? Discuss Aloha protocol with diagram. [8]

(b) Explain Rake receiver principle and working of the receiver. [8]

4. (a) Explain GSM Network Architecture with working principle. [8]

(b) Explain need of Mobile IP? How packet delivery perform in mobile IP routing networks explain with diagram. [8]

4. (a) Explain Bluetooth protocol structure with application. [8]

(b) Write short note on WLAN and WLL. [8]

5. Explain All parts of Satellite earth station with block diagram and example. [16]

5. Write short note on the followings: (i) Keplers law of orbital motion. (ii) LEO, MEO, GEO (iii) Reliability of satellite (iv) Telemetry Tracking and control. [4x4=16]