UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Phase modulation is commonly-used for data transmission mainly because ____ .
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phase can be varied from + 180
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it is resistant to the effects of noise
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demodulation is very easy
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it gives highest data rates that can be transmitted over a given channel
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Explanation:
Detailed explanation-1: -The constant envelope modulation schemes such as FSK and PSK are the most suitable for satellite communications because they minimize the effect of nonlinear amplification in the high-power amplifier.
Detailed explanation-2: -Microwaves are used for satellite communication since the lower bands get reflected by the ionosphere.
Detailed explanation-3: -Radio waves are used to carry satellite signals. These waves travel at 300, 000 km/s (the speed of light). This means that a signal sent to a satellite 38, 000 km away takes 0.13 s to reach the satellite and another 0.13 s for the return signal to be received back on Earth.
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