R.G.P.V. BHOPAL
E.C. 7th Semester EXAMINATION
SATELLITE COMMUNICATION EC-7201
Time: 3Hrs Max Marks: 100 Min Marks: 40
Note:Attempt any 5 questions.All question Carry equal marks.
Note:Attempt any 5 questions.All question Carry equal marks.
Q.1 (a)What are the factors on which noise temperature is dependent?On the basis of which device satellite is called passive satellite?
(b) Why uplink design is easier than down-link design? What is main advantage in using CSSB link?
Q.2 (a) Why TDMA is not well suited to narrow-band signals from small earth stations?What is reference burst in TDMA system?
(b) What is the drawback of FDMA in satellite communication system when transponder has non-linear characteristic?
Q.3 An earth station, has an overall efficiency of 74Vo, has a diameter of 45 m and is used to receive a signal at 5439M Hz. At this frequency ,the system noise temperature is 81 K when the antenna points at satellite at an elevation angle of 25". What is earth station GIT ratio under these conditions ?
Q.4 (a) What type of effect will be caused by econosphere on satellite performance ?
(b) What is pointing error in optical satellite link ?Why satellites are preferred for military applications ?
Q.5 Discuss data communication services and scientific studies by satellites.Also write advantages and disadvantage osf using satellite for these services ?
Q.6 (a) Explain optical satellite link receiver with block diagram ?
(b) Discuss tracking and pointing in optical satellite link. ?
Q.7 (a) Describe DATDMA system ?
(b) Discuss TDMA frame structure ?
Q.8 (a) Determine the equation for power output of an up link transmitter ?
(b) Explain BPSK detector with block diagram ?
Q.9 (a) Discuss orbital aspects of satellite communication ?
(b) What is CSSB system discuss in detail ?
(b) What is the drawback of FDMA in satellite communication system when transponder has non-linear characteristic?
Q.3 An earth station, has an overall efficiency of 74Vo, has a diameter of 45 m and is used to receive a signal at 5439M Hz. At this frequency ,the system noise temperature is 81 K when the antenna points at satellite at an elevation angle of 25". What is earth station GIT ratio under these conditions ?
Q.4 (a) What type of effect will be caused by econosphere on satellite performance ?
(b) What is pointing error in optical satellite link ?Why satellites are preferred for military applications ?
Q.5 Discuss data communication services and scientific studies by satellites.Also write advantages and disadvantage osf using satellite for these services ?
Q.6 (a) Explain optical satellite link receiver with block diagram ?
(b) Discuss tracking and pointing in optical satellite link. ?
Q.7 (a) Describe DATDMA system ?
(b) Discuss TDMA frame structure ?
Q.8 (a) Determine the equation for power output of an up link transmitter ?
(b) Explain BPSK detector with block diagram ?
Q.9 (a) Discuss orbital aspects of satellite communication ?
(b) What is CSSB system discuss in detail ?
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