ECE :: Communication Systems
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In FSK no synchronous carrier is needed at the receiver
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The constellation diagram of a modem has four states as shown in the figure given below. What is the bit rate of this modem?
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When the modulating frequency is doubled, the modulation index is halved and the modulating voltage remains constant. The modulation system is
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Vividh Bharti programme is transmitted in
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In a Vidicon camera tube, the beam current is controlled by
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Johnson noise is
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Which of the following is unlikely to happen when quantising noise is decreased in PCM?
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For real and odd signals, the Fourier series coefficient an is
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An amplitude modulated wave is
e = 50 (1 + 0.4 cos 1000 t + 0.3 cos 10000 t) cos 107 t
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