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GATE 2019: Communication Quiz 8 (App update required to attempt this test)
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Question 1
Match the following List-I with List-II
List-I
A) PCM
B) FSK
C) Asynchronous TDM
D) DM
List-II
1) Telegraphy
2) Pulse shifting
3) Simple circuit
4) Companding
5) Threshold effect
List-I
A) PCM
B) FSK
C) Asynchronous TDM
D) DM
List-II
1) Telegraphy
2) Pulse shifting
3) Simple circuit
4) Companding
5) Threshold effect
Question 2
The input to a linear delta modulator having Fa step size 
is a sine wave with frequency Fm and peak amplitude Em. If the sampling freq. FS = 40 KHz, the combination of the sinc wave freq. and the peak amplitude, where slope overload take place is
is a sine wave with frequency Fm and peak amplitude Em. If the sampling freq. FS = 40 KHz, the combination of the sinc wave freq. and the peak amplitude, where slope overload take place is Question 3
The two binary FSK signals are given by
The minimum frequency separation of these two signals to be orthogonal is
The minimum frequency separation of these two signals to be orthogonal is
Question 4
A CDMA system is designed based on DS spread spectrum with a processing gain of 1000 and BPSK modulation scheme. If user has equal power and the desired level of performance of an error probability of 10–6, the no. of user will be
Question 5
The pulse rate in a delta modulation system is 84000 pulse/sec. For the input signal of 
, the optimum value of step size to prevent slope overload distortion is_________V.
, the optimum value of step size to prevent slope overload distortion is_________V.Question 6
A sinusoid message signal m(+) is transmitted by binary PCM without compression. If the signal to quantization noise ratio is required to be at least 48dB, the main. No. of bits per sample will be
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Aug 20ESE & GATE EC
