Digital Communication Questions and Answers
Q1.
Spread spectrum multiple access techniques allows the multiple signal to be transmitted
Answer :
Simultaneously
Q2.
Frequency hopping system can provide reliable mitigation only if
Answer :
Hopping rate is greater than the symbol rate & its bandwidth is large
Q3.
Caesar cipher was a mono alphabetic cipher.
Answer :
True
Q4.
A cipher system is said to have perfect secrecy if
Answer :
Posteriori probability is equal to priori probability
Q5.
When the key size is finite, equivocation approaches
Answer :
Zero
Q6.
Bandwidth efficiency improvement involves
Answer :
Dividing the geographical region into cells & Allowing frequency allocation
Q7.
The types of channels that reverse channel contains are
Answer :
Traffic & Access
Q8.
Which channel is more robust?
Answer :
Forward channel
Q9.
Acquisition can be of ______ type.
Answer :
Coherent & Non coherent
Q10.
How many correlators are used for despreading and code tracking function?
Answer :
One
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