JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III B.TECH – II SEM SUPPLEMENTARY EXAMINATIONS JANUARY- 2010 SATELLITE COMMUNICATION (ELECTRONICS & COMMUNICATIONS ENGINEERING) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks --1.
Mention some important milestones in the development of satellite communication and describe its growth. [16]
2.
Discuss in detail the orbital effects in satellite communication system performance.[16]
3.
Explain about spacecraft subsystem in detail.
4.
Explain about the various effects and their remedies of external satellite environment around satellite antenna. [16]
5.a)
Derive the general link design equation for a satellite and prove that a large G/T ratio provides better C/N ratio. A satellite at a distance of 36,000 km from earth radiates a power of 5W from an antenna with a gain of 16dB. Find the power received by an earth station antenna with a gain of 45dB. Operating frequency is 11GHZ. [10+6]
b)
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6.a)
Explain what is meant by thin route service. What type of satellite access is most suited for this type of service ? Determine how many carriers can access an 80 MHz transponder in the FDMA mode, given that each carrier requires a bandwidth of 6 MHz, allowing for 6.5 dB output backoff. Compare this number with the number of carriers possible without back-off. [8+8]
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b)
[16]
Draw the block diagram of earth station neatly and explain each block in detail.
8.
Analyze various noises disturbing the received signal from satellite at earth station.[16]
jawaharlal nehru technological university hyderabad iii b.tech
b) Determine how many carriers can access an 80 MHz transponder in the FDMA mode, · given that each carrier requires a bandwidth of 6 MHz, allowing for 6.5 ...
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Explain the importance of concurrent Engineering in product development. [16] ... the traditional product development cycle and Product development using.
6.a] Explain different types of floors in brief. b] Explain what is DPC and what are the different materials used. [8+8] · 7. Write short notes on: · i.] Scaffolding.
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(CIVIL ENGINEERING) · Time: 3 hours · Max. Marks.80 · Note:- Answer any one question · Assume suitable data if necessary · --- · 1. Design and draw plan and ...
7) a) With the help of P-V and T-S diagrams, show that for the same maximum · pressure and temperature of the cycle and the same heat rejection thermal.
Identity the distributing aspect of science of fiction and examine how this problem can · be resolved. [16] · 3. Do you justify that the story of Silent Spring is a fable for tomorrow? [16] · 4. In what ways does chemical pollution affect the structu
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[16] · 6. Explain the role played by Small Industries Service Institute (SISI) in promoting ... f. National Small Industries Corporation (NSIC). g. Small Scale ...
