Digital Communication Questions and Answers
Q1.
For direct sequence systems what is the minimum required processing gain?
Answer :
10db
Q2.
The key also contains a
Answer :
Plaintext & Ciphertext
Q3.
In auto key method
Answer :
Feedback is necessary
Q4.
Equivocation is the
Answer :
Conditional probability of X given Y
Q5.
If the active users using a cell doubles, the required Eb/I0
Answer :
Halves
Q6.
Which technique is dimension limited?
Answer :
TDMA & FDMA
Q7.
Short code is configured using ______ shift register.
Answer :
15-stage
Q8.
Acquisition is a process of bringing two spreading signals into _______ alignment.
Answer :
Coarse
Q9.
Acquisition can be accomplished _______ as all possible codes are examined ______
Answer :
Rapidly, simultaneously
Q10.
In direct sequence process which step is performed first?
Answer :
De-spreading
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