Digital Communication Questions and Answers
Q1.
In CDMA, the users share the bandwidth
Answer :
Asynchronously
Q2.
Direct system allows detection of signals whose psd level is
Answer :
Below noise level
Q3.
In Caesar cipher, each plain text is replaced by
Answer :
Alphabet shift
Q4.
The conditions for perfect secrecy are
Answer :
One key transforming message to each cipher text & all keys should be equally likely
Q5.
When a system is called as unbreakable?
Answer :
When unique solution is not available
Q6.
Which has more user capacity?
Answer :
CDMA
Q7.
The steps followed in forward channel CDMA includes
Answer :
Modulo 2 addition & Channelization
Q8.
Which serves the hard hand-off process?
Answer :
Mobile switching center
Q9.
Uncertainty in the distance between transmitter and receiver translates into uncertainty in
Answer :
Propagation delay
Q10.
Which has worse signal to noise performance?
Answer :
Tau-dither loop
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