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GATE 2019: Communication Quiz 6 (App update required to attempt this test)

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Question 1

In time division multiplexing, the noise contribution of PM detector as compare to FM detector is

Question 2

In a AM signal, received signal power is

with a maximum modulating signal of 5kHz.The noise spectral density at the receiver input is

.If noise power is restricted to the message signal bandwidth only then signal-to-noise ratio at the input to the receiver is_______ (dB)

Question 3

The AM signal gets added to a noise with Power Spectral Density S_n(f) given in the figure below. The ratio of average sideband power to mean noise power would be:

Question 4

Consider the following Amplitude Modulated (AM) signal, where f_m < B:

The AM signal gets added to a noise with Power Spectral Density S_n(f) given in the figure below. The ratio of average sideband power to mean noise power would be:

Question 5

Noise with uniform power spectral density of N₀W/Hz is passed through a filter $Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC-ME-17-Mar\GATE-ECE-2005_files\image163.png$ followed by an ideal low pass filter of bandwidth B Hz. The output noise power in watts is

Question 6

Consider an FM modulated signal with a sinusoidal modulation signal with maximum frequency deviation of 60 kHz and bandwidth of 15 kHz. If input signal power, noise spectral density and baseband bandwidth are same, then ratio of the figure of merit for FM to AM with 100% modulation system is _______.

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ESE & GATE EC Communications

Jun 10ESE & GATE EC