ECE :: Satellite Communication
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The quality of a space-link is measured in terms of the __________ ratio.
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The useful operational life of INSAT-IB (launched in 1983) is expected to end by
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Orbital disturbances of a geosynchronous satellite are caused by the
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Which one of the following statement is correct?
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In a stop-and-wait ARQ system, the transmitting terminal
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A geostationary satellite is one which
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The geostationary communication satellite APPLE is parked in the equatorial orbit at
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Power received from Sun per m2 surface area of a geosynchronous satellite in nearly __________ watt.
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A certain sound has 10000 times more energy than another sound. The number of times it would sound stronger to a listener is
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A.
Satellite spacing is not affected by the bandwidth of the transmitting earth station
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B.
Beamwidth is independent of antenna size and frequency band used
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C.
The width of a beam in space is inversely proportional to the width of the transmitting antenna
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D.
Use of high-frequency bands permits less number of satellites to share the orbit
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A.
waits for positive or negative acknowled-gement from the receiving terminal after sending a block
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B.
sends another block if positive acknowledge is received through ACK character
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C.
resends the previous block if negative acknowledgement is received through a NAK character
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D.
does not wait for acknowledgement after sending a block
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