Digital Communication Questions and Answers
Q1.
Noise which can affect sampling are
Answer :
Thermal sensor & Analog circuit noise
Q2.
Sampling of simultaneously two different but related wave-forms is called as
Answer :
Complex sampling
Q3.
In Gaussian channel demodulator ______ decision is made.
Answer :
Soft
Q4.
The probability of message error is written as
Answer :
Block & Word error
Q5.
Examples of structured sequences are
Answer :
1. Block codes
2. Convolutional codes
3. Turbo codes
Q6.
In orthogonal signal, all cross correlation coefficients are
Answer :
Zero
Q7.
Transorthogonal code is obtained by
Answer :
Deleting first digit of each orthogonal codeword
Q8.
In non coherent reception _____ is measured.
Answer :
Energy
Q9.
Matched filter is a _____ technique.
Answer :
Demodulation
Q10.
PCM includes the process of
Answer :
Amplitude & Time discretization
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