ECE :: Communication Systems
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In the television system in India, each frame is scanned
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Each kilometer of travel in electromagnetic radiation means a time delay of
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A RADAR can be used to
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In single tone AM modulation, the transmission efficiency for m = 1 is
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AM amplifier having noise figure of 20 dB and available power gain of 15 dB is followed by a mixer circuit having noise figure of 9 dB. The overall noise figure as referred to input in dB is
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Which one of the following is non-resonant antenna?
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If the oscillator output is modulated by audio frequencies upto 10 kHz, the frequency range occupied by the side bands will be
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The efficiency of using a binary system for selection of 1 out of 13 equally probable events is
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The most suitable method for detecting a modulated signal g(t) = (3 to 6 cos 2pfmt) cos 2pfct is
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