Digital Communication Questions and Answers
Q1.
In MPSK adding new signals _______ make it vulnerable to noise and in MFSK _______ make it vulnerable.
Answer :
Does, does not
Q2.
The correlating detector is also known as
Answer :
Maximum likelihood detector
Q3.
The minimum required spacing is the difference between the
Answer :
Center of the spectral main lobe and first zero crossing
Q4.
Wavelength and antenna size are related as
Answer :
λ/4
Q5.
The FSK signal which has a gentle shift from one frequency level to another is called as
Answer :
Continuous PSK
Q6.
Noise figure measures the
Answer :
SNR degradation
Q7.
Which parameter is referred to as receiver sensitivity?
Answer :
G/T ratio
Q8.
AM-to-PM conversion brings about
Answer :
Phase variation
Q9.
Thermal noise is generated due to
Answer :
Lossy coupling
Q10.
In continuous ARQ will pullback uses _____ system.
Answer :
Full duplex
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