B.E-B.E Electronics and Tele-Communication Engineering Satellite Communication (Sathyabama University, Chennai, Tamil Nadu-2010)
Friday, 23 August 2013 02:46Duraimani
(Established under section 3 of UGC Act,1956)
Course & Branch :B.E - ETCE
Title of the Paper :Satellite Communication Max. Marks :80
Sub. Code :525706/6ETE01 Time : 3 Hours
Date :06/03/2010 Session :AN
PART - A (10 x 2 = 20)
Answer ALL the Questions
1. State Kepler’s third law.
2. Define apogee and perigee.
3. List out the advantages of TWT.
4. Define saturation and compression point.
5. Write the equation for system noise temperature.
6. Define saturation flux density.
7. Define burst rate and average bit rate.
8. What do you mean by guard time?
9. What does the term position dilution precision factor of refer to?
10. Define GPS time.
PART – B (5 x 12 = 60)
Answer All the Questions
11. State Kepler’s three laws of planetary motion. Illustrate in each case their relevance to artificial satellites orbiting the earth.
(or)
12. Explain in detail about geocentric-equatorial coordinate system which is based on the earth’s equatorial plane.
13. Draw the block diagram of TT&C and explain each and individual blocks.
(or)
14. Describe briefly the most common type of high-power amplifying device used aboard a communication satellite.
15. Discuss briefly how demand assignment and preassignment may be implemented in TDMA network. What are the advantages of TDMA over FDMA in this respect?
(or)
16. With neat sketch explain a parabolic antenna.
17. Write the relevant expression and explain in detail about transmission losses.
(or)
18. Define and explain the terms carrier recovery, traffic data, frame efficiency and channel capacity.
19. Describe the operation of typical VSAT system. State briefly where VSAT systems find widest application.
(or)
20. Explain why a minimum of four satellites must be visible at an earth location utilizing the GPS system for position determination. What does the term dilution of precision refer to?
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