Digital Communication Questions and Answers
Q1.
R-S codes have
Answer :
High code rate & Low redundancy
Q2.
The number of k bit shift over which a single information bit influences the encoder output is given by
Answer :
Constraint length
Q3.
In trellis diagram, the number of nodes ______ at successive branching.
Answer :
Doubles
Q4.
If the quantization level of a demodulator output is ________ then it is called as soft decision decoding.
Answer :
More than 2
Q5.
Branch word synchronization is the process of determining the
Answer :
Beginning of received sequence
Q6.
The received code contains an error if the syndrome vector is
Answer :
Non zero
Q7.
Linear codes are used for
Answer :
Forward error correction
Q8.
Syndrome is calculated by
Answer :
rHT
Q9.
The distance between two code-words is equal to the _____ of the third code-word which is the sum of the first two code-words.
Answer :
Weight
Q10.
Nyquist frequency is given by
Answer :
fs/2
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