Download GTU BE/B.Tech 2019 Summer 8th Sem New 2181007 Satellite Communication Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019

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Subject Code:2181007 Date:17/05/2019
Subject Name:Satellite Communication
Time:10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

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

Q.1 (a) Define: (i) Ascending Node (ii) Descending Node (iii) Inclination 03
(b) Explain difference between FDMA and TDMA. 04

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(c) Explain Kepler’s 2^nd & 3^rd Law. 07

Q.2 (a) Define: Line of nodes, Equinox and Satellite footprint. 03
(b) Define and discuss about Mean anomaly and True anomaly. 04
(c) Elucidate the block diagram of Satellite Transponder. Also explain 07
the frequency reuse technique for Transponder.

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OR
(c) Discuss LEO, MEO & GEO Satellite orbits with application. 07

Q.3 (a) Define: INTELSAT, INSAT and Altitude. 03
(b) How the error control done in Digital DBS-TV? Explain it. 04
(c) What is uplink and downlink? Design all the steps to follow for 07

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Uplink power budget preparation.
OR
Q.3 (a) Evaluate the System Noise Temperature of earth station receiver. 03
(b) What do you mean by multiple access technique? Explain Time 04
Division Multiple Access in detail.

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(c) Explain LEO, MEO & GEO Satellite orbits with application. 07

Q.4 (a) What is prograde orbit? 03
(b) Explain the spade system in short. 04
(c) Enlighten Sun Synchronous and Molniya orbit with their uses. 07
OR

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Q.4 (a) Define: Right ascension of the ascending node for Earth orbiting 03
satellites.
(b) Explain timing accuracy in terms of GPS system. 04
(c) Draw the block diagram of DBS-TV receiver. 07

Q.5 (a) Discuss orbit perturbations in brief. 03

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(b) List all seven operational NGSO constellation design and explain 04
any one of them in detail.
(c) Explain what is XPD? How XPD are predicted? Also Draw and 07
Explain properly The Canting Angle and Tilt Angle with required
equations.

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OR
Q.5 (a) Explain Demand Access Multiple Access method. 03
(b) Explain C/A code generator regarding GPS. 04
(c) Explain the principles of GPS location finding. Also explain Satellite 07
signal acquisition in detail.

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