Digital Communication Questions and Answers
Q1.
Sampling can be used in
Answer :
1. Audio
2. Speech
3. Video
Q2.
Reconstruction of continuous signals is done using
Answer :
Interpolation algorithm
Q3.
The ratio of redundant bits to data bits is called as
Answer :
Redundancy rate
Q4.
Coding gain is defined as
Answer :
Reduction in Eb/N0
Q5.
Orthogonal vectors are
Answer :
1. Perpendicular to each other
2. Their dot product must be zero
3. One signal cannot interfere with the other
Q6.
Biorthogonal set consists of
Answer :
Combination of orthogonal and antipodal
Q7.
Which FSK has no phase discontinuity?
Answer :
Continuous FSK
Q8.
If we correlate the received signal with any one of the two orthogonal function, the obtained inner product will be
Answer :
Zero
Q9.
QAM uses ______ as the dimensions.
Answer :
In phase & Quadrature
Q10.
Modulation process corresponds to ______ the amplitude, frequency or phase.
Answer :
Switching or keying
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