Digital Communication Questions and Answers
Q1.
Properties of Fourier transform are
Answer :
1. Duality property
2. Time shifting property
3. Modulation property
Q2.
Fourier transform of a signal gives the
Answer :
Frequency content & Bandwidth
Q3.
Which are orthonormal signal representation?
Answer :
1. Sine and cosine at same frequency
2. Wavelets
3. Complex sinusoids at a different frequency
Q4. The power spectral density function of the stochastic process is
Answer :
Real
Q5.
The line code has a zero dc component for pulse transmission of random binary data is
Answer :
Alternate mark inversion
Q6.
Non uniform tree _____ bit rate.
Answer :
Increases
Q7.
Which are the common transmission media used in digital communication system?
Answer :
1. Coaxial cable
2. Twisted copper cable
3. Radio frequency bands
Q8.
Ground wave communication occurs in
Answer :
Low & Medium frequency band
Q9.
Loop filter is a ______ used to reduce noise.
Answer :
Low pass filter
Q10.
Which corrects the sampling time problem in a digital system?
Answer :
Interpolator
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