Andhra University 2005-1st Year B.Tech Information Technology Forth Semester - SATELLITE AMD MOBILE COMMUNICATIONS (Elective I) - Question Paper

MODEL PAPER

B. Tech (IT) Degree exam

Forth Year - 1st Semester

SATELLITE AMD MOBILE COMMUNICATIONS (Elective I)

Time: three hrs
Max Marks: 70

First ques. is Compulsory

ans any 4 from the remaining ques.

All ques. carry equal marks

ans all parts of any ques. at 1 place

1. (a) elaborate synchronous satellites?
(b) Why the uplink and down link frequencies are different?
(c) elaborate active and passive satellites?
(d) elaborate the different interferences that may affect the satellite link performance and design?
(e) elaborate the key attributes of Intelligent Network?
(f) What is the principle of cellular systems?
(g) discuss about the various multiple accesses technologies in cellular system?

2. (a) discuss the working of an earth station with the help of block diagram? (10)
(b) elaborate the advantages of satellite communications? (4)

3. (a) find the complete link design of Satellite communication? (10)
(b) discuss the significance of C/N and G/T ratios? (4)

4. (a) discuss TDMA Technology in Satellite communication? (5)
(b) discuss about TDMA frame structure and burst structure? (9)

5. (a) elaborate the frequency bands allocated to Satellite communications and discuss reasons? (4)
(b) elaborate the satellite subsystems? discuss every briefly. (10)

6. (a) discuss the general principles in cellular system operation and planning. (10)
(b) discuss about AMPS system. (4)

7. (a) discuss about GSM reference architecture and function partitions. (10)
(b) What is GSM protocol model? (4)

8. (a) discuss the Iridium system architecture. (7)
(b) discuss the procedure of call setup in global star system. (7)

Earning:   Approval pending.