Digital Communication Questions and Answers
Q1.
Which factors are measured using the units of lines per picture height?
Answer :
Resolution & Sampling rate
Q2.
In binary symmetric channel, in the demodulator _____ decision is made.
Answer :
Hard & Soft
Q3.
The summation operation is performed using _____ logical operation.
Answer :
EX-OR
Q4.
Channel coding relates to area such as
Answer :
Waveform coding & Structured sequence
Q5.
In non orthogonal signalling as k increases there is
Answer :
1. Degraded error performance
2. Improved bandwidth efficiency
3. Increase in required Eb/N0
Q6.
Biorthogonal codes needs ________ bandwidth as orthogonal codes.
Answer :
Half
Q7.
FSK reception uses
Answer :
Correlation receiver & PLL
Q8.
Simulation is used to determine
Answer :
Bit error rate
Q9.
Which system uses QAM?
Answer :
Digital microwave relay & Dial up modem
Q10.
Which has same probability of error?
Answer :
PSK and FSK
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