Digital Communications

Quantization

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The theoretical gain in zero crossing TED is greater than early late TED.
True
False
Explanation:
The theoretical gain in zero crossing timing error detection is twice more than that in the early late timing error detection method.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Delta modulation is
1 bit DPCM
2 bit DPCM
4 bit DPCM
None of the mentioned
Explanation:
Delta modulation is also considered as 1 bit DPCM.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Quantization is a _____ process.
Non linear
Reversible
Non linear & Reversible
None of the mentioned
Explanation:
Quantization is a non linear and irreversible process.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Which helps in maintaining the step size?
Delta modulation
PCM
DPCM
Adaptive delta modulation
Explanation:
Step size if effectively maintained using adaptive delta modulation.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
If the channel is noiseless information conveyed is ___ and if it is useless channel information conveyed is ___
0,0
1,1
0,1
1,0
Explanation:
If the channel is noiseless information conveyed is 1 and if it is useless channel information conveyed is 0.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
The SNR value can be increased by _____ the number of levels.
Increasing
Decreasing
Does not depend on
None of the mentioned
Explanation:
The signal to noise ratio can be increased by increasing the number of levels.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
When the base of the logarithm is e, the unit of measure of information is
Bits
Bytes
Nats
None of the mentioned
Explanation:
The unit of measure of information is determined based on the base of logarithm. If the base is e then the unit is nats( natural unit).
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which is a quantization process?
Rounding
Truncation
Rounding & Truncation
None of the mentioned
Explanation:
Rounding and truncation are examples of quantization process.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
The mutual information between a pair of events is
Positive
Negative
Zero
All of the mentioned
Explanation:
The mutual information between a pair of events can be positive negative or zero.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Quantization is a _____ process.
Few to few mapping
Few to many mapping
Many to few mapping
Many to many mapping
Explanation:
Quantization is a many to few mapping process.