Digital Communication Questions and Answers
Q1.
Which is easier to implement and is preferred?
Answer :
Non coherent system
Q2.
Equalization process includes
Answer :
Maximum likelihood sequence estimation & Equalization with filters
Q3.
The _____ of the opening of eye pattern indicates the time over which the sampling for detection might be performed.
Answer :
Width
Q4.
For a M-ary signal or symbol the number of likelihood functions are
Answer :
M
Q5.
The impulse response of the filter is the _____ of the mirror image of the signal waveform.
Answer :
Delayed version
Q6.
A nyquist pulse is the one which can be represented by _____ shaped pulse multiplied by another time function.
Answer :
Sinc
Q7.
A pulse shaping filter should satisfy two requirements. They are
Answer :
Should be realizable & have proper roll off factor
Q8.
White noise has _____ power spectral density.
Answer :
Constant
Q9.
The average noise power of white noise is
Answer :
Infinity
Q10.
Which is more vulnerable to noise?
Answer :
4-ary system
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