Digital Communication Questions and Answers
Q1.
Which signals are function of time?
Answer :
Deterministic signal
Q2.
Non uniform quantization includes
Answer :
Compression & Expansion
Q3.
The method in which small amount of controlled ISI is introduced into the data stream rather than trying to eliminate it completely is called as
Answer :
1. Correlative coding
2. Duobinary signalling
3. Partial response signalling
Q4.
The duobinary filter, He (f) is called as
Answer :
Cosine filter
Q5.
Application of phase encoded binary signals are
Answer :
1. Optical communication
2. Magnetic recording
3. Satellite telemetry
Q6.
Which waveform scheme introduces bandwidth compression?
Answer :
Multilevel codes
Q7.
Which method should be implemented for reducing bandwidth?
Answer :
Multilevel signalling
Q8.
Examples of PCM waveforms are
Answer :
1. Non return to zero
2. Phase encoded
3. Multilevel binary
Q9.
The return to zero waveform consists of
Answer :
1. Unipolar RZ
2. Bipolar RZ
3. RZ-AMI
Q10.
The size of the quantile interval is called as
Answer :
Step size
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