Download GTU BE/B.Tech 2018 Winter 7th Sem Old 171007 Satellite Communication Question Paper

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Subject Code: 171007

GUJARAT TECHNOLOGICAL UNIVERSITY

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Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. (a) List out various multiple access techniques and compare any two of them. [07]
   

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   (b) What is GPS? Explain the principles of GPS position location. Also mention various applications of GPS. [07]
2. (a) What are different types of orbit used for satellite communication? Explain each one in brief. [07]
   (b) With the help of necessary diagrams justify the role of Telemetry, Tracking, Command & Monitoring in satellite communication. [07]
3. (a) OR
   List out various orbital elements and explain each one in detail. [07]
   

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   (b) Why transponder is called so? Draw block diagram of satellite transponder. Explain each block in detail. [07]
4. (a) What is uplink? Draw and explain Uplink block diagram. Also explain uplink power budget design. [07]
   (b) OR
   List out & explain in brief various types of antenna used in space segment. [07]
5. (a) Define downlink. Represent the same pictorially. Derive the power budget calculations for downlink. [07]
   

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   (b) Explain following in brief: [07]
   1. Solar eclipse of satellite
   2. Sun transit outage
6. (a) Write a detailed note on system noise temperature and G/T ratio with respect to satellite link design. [07]
   (b) OR
   

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   Write a detailed note on demand access multiple access technique. [07]
7. (a) Illustrate the concept of XPD & its prediction. Compare XPD with XPL [07]
   (b) Write short notes on access control protocols used in VSAT network. [07]
8. (a) Draw and explain in detail the Direct Broadcast Satellite TV system. [07]
   (b) OR
   

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   Draw & explain in brief block diagram of simplified GPS receiver. Also draw block diagram of signal generation in a satellite. [07]
9. (a) How error control is performed in Digital DBS-TV? Explain with suitable block diagram. [07]

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