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GATE EC 2022: Communication System Quiz 5 (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
A super heterodyne receiver is designed to receive transmitted signals between 5 and 10 MHz. High – side tuning is to be used. The tuning range of the local oscillator for IF frequency 500 kHz would be
Question 3
Consider an LTI system with impulse response given as 
. A wide-sense stationary (WSS) random process 
with autocorrelation function 
, is applied to the input of the above-mentioned system. Find the autocorrelation of the output signal 
if its given that ‘A’ and ‘a’ are real positive constants.
. A wide-sense stationary (WSS) random process with autocorrelation function , is applied to the input of the above-mentioned system. Find the autocorrelation of the output signal if its given that ‘A’ and ‘a’ are real positive constants. Question 4
If the joint probability matrix is given as
.
.
The mutual information for the channel is____ bits.
Question 5
Following are the data given for an amplifier
Noise figure = 4dB
Bandwidth = 500 kHz
Input resistance = 50 W
If the amplifier is connected to a signal source of 50W at 290 K, then the input signal voltage needed to yield an output SNR = 1 is ______________
Question 6
Binary data is to be transmitted at the rate Rb = 800 kbps on a radio channel having 250 kHz bandwidth. The modulation method that minimizes the signal energy is
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Jun 8ESE & GATE EC
