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ESE 2019 Technical ( Communication system: Quiz 1 )
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Question 1
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Question 2
Consider the following statements regarding Time-Division Multiplexing (TDM):
1) The information from different measuring points is transmitted serially on the same communication channel.
2) It involves transmission of data samples rather than continuous data transmission.
3) It is especially useful when telemetering fastchanging, high bendwidth data.
Which of the above statements are valid in respect to TDM?
1) The information from different measuring points is transmitted serially on the same communication channel.
2) It involves transmission of data samples rather than continuous data transmission.
3) It is especially useful when telemetering fastchanging, high bendwidth data.
Which of the above statements are valid in respect to TDM?
Question 3
The Vestigial Side Band (VSB) modulation is preferred in TV systems because
1) It reduces the bandwidth requirement
2) It avoids phase distortion at low frequencies
Which of the above statements is/are correct?
1) It reduces the bandwidth requirement
2) It avoids phase distortion at low frequencies
Which of the above statements is/are correct?
Question 4
In a pulse code modulated system, the number of bits is increased from 7 to 8 bits. The improvement in signal to quantization noise ratio will be
Question 5
The minimum bandwidth of the link needed for a guard band of 10 kHz frequency to prevent interference between six channels, each with 100kHz frequency, is
Question 6
The response of a Gaussian random process applied to a stable linear system is:
1) A Gaussian random process
2) Not a Gaussian random process
3) Completely specified by its mean and auto-covariance functions.
Which of the above statements is/are correct?
1) A Gaussian random process
2) Not a Gaussian random process
3) Completely specified by its mean and auto-covariance functions.
Which of the above statements is/are correct?
Question 7
If a random process X(t) is ergodic then statistical averages
Question 8
Match List-I with List-II (Definition) and select the correct answer using the code given below the lists:
List-I
A). Pilot carrier
B). Tuned circuit
C). Slope overload
D). A to D converter
List-II
1). Delta modulation
2). Frequency modulation
3). PCM
4). Single sideband AM
List-I
A). Pilot carrier
B). Tuned circuit
C). Slope overload
D). A to D converter
List-II
1). Delta modulation
2). Frequency modulation
3). PCM
4). Single sideband AM
Question 9
The figure below describes fixed channel allocation method with borrowing where cells are marked as cell 2 and cell 1. In this, if cell 1 are not allowed to use a4 channel, then which among the following options are correct?
i. figure contains 2 adjacent cells with a4 channel after borrowing
ii. channel a4 is locked with cells marked as cell 2
iii. transferring rates will increase after borrowing
iv. low quality receiving of voice due to borrowing
i. figure contains 2 adjacent cells with a4 channel after borrowing
ii. channel a4 is locked with cells marked as cell 2
iii. transferring rates will increase after borrowing
iv. low quality receiving of voice due to borrowing
Question 10
A random process X(t) is called ‘white noise’ if the power spectral density is equal to
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Nov 9ESE & GATE EC
