Digital Communication Questions and Answers
Q1.
The distribution function of random variable is
Answer :
P(X less than or equal to x)
Q2.
A random process is called as stationary in strict sense if
Answer :
Its statistics vary with shift in time origin
Q3.
White noise has ____ mean and ____ variance.
Answer :
Zero and finite
Q4.
What is Wiener-Khinchin theorem?
Answer :
Spectral density and auto-correlatioon makes a fourier tranform pair
Q5.
Autocorrelation is maximum at _______
Answer :
Origin
Q6.
Which signal is called as energy signal?
Answer :
Finite energy and zero power
Q7.
Which circuit is called as regenerative repeaters?
Answer :
Digital circuits
Q8.
What is the code rate?
Answer :
k/n
Q9.
Which filter does not have sharp output?
Answer :
Linear phase & Delayed symmetric filter
Q10.
Reconstruction filter is difficult to implement in hardware.
Answer :
False
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