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GATE 2019: Communication Quiz 10 (App update required to attempt this test)

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Question 1

A receiver receives a signal of 10 units’ power with a noise of 0.1-unit power. If its figure of merit is 5. What would be its Signal to Noise ratio (SNR) output?

Question 2

A PCM system uses uniform quantizer followed by a 7 bit binary encoder. The bitrate of the system is equal to 50 Mbps. The approximate signal to noise ratio when a sinusoidal modulating wave of frequency 1 MHz is applied to the input is

Question 3

SNR of a telephone line is 40 dB. In order to carry 256 kbps data, the minimum bandwidth required is ________ kHz.

Question 4

A modulating signal is used to frequency modulate a carrier of frequency 106 Hz. If the amplitude of modulating signal is halved and the modulating frequency is doubled then the change in the bandwidth of modulated signal is ± _______kHz.
(Assume modulation index β = 10)

Question 5

A communication channel of bandwidth 35 kHz is required to transmit binary data at a rate of 0.05 Mbps using raised-cosine pulses. The roll off factor α is __________.

Question 6

The bandwidth efficiency of an 8-ary PSK signal is given by
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Oct 7ESE & GATE EC