Digital Communication Questions and Answers
Q1.
A base-band signal can be up-converted using
Answer :
Cosine wave
Q2.
Random things in a communication system are
Answer :
1. Timing offset
2. Device frequency
3. Attenuation
Q3.
Constellation diagram is plotted in
Answer :
Signal space
Q4.
For a periodic function, the spectral density and auto correlation functions form
Answer :
Fourier transform pair
Q5.
The auto-correlation of white noise is
Answer :
A delta function
Q6.
Two clock with rates T1 and T2 are incommensurate if its ratio is
Answer :
Irrational
Q7.
The basic transmission-reception system is a ______ system.
Answer :
Three block system
Q8.
Sampling theorem is used for converting
Answer :
Continuous time signal to discrete & vice versa
Q9.
What are the main features of a receiver?
Answer :
Synchronization & Multiple parallel receiver chain
Q10.
What are the main features of a transmitter?
Answer :
1. Higher clock speed
2. Linear power amplifier
3. Directional antennas
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