Digital Communication Questions and Answers
Q1.
Example of block code is
Answer :
1. Hamming code
2. Reed-solomon code
3. Repetition code
Q2.
Antennas are used
Answer :
As transducer & To focus
Q3.
According to reciprocity theorem, _____ and _____ are identical.
Answer :
Transmitting gain and receiving gain
Q4.
For a error free channel, conditional probability should be
Answer :
Zero
Q5.
The inter leaver connected between the two decoders is used to
Answer :
Scatter error bursts
Q6.
Sources of channel errors are
Answer :
1. Finger prints
2. Air bubbles
3. Unwanted particles
Q7.
The channel that exhibits multi-path fading
Answer :
1. Has memory
2. Exhibits mutually dependent signal transmission impairments
3. Received signal will be distorted
Q8.
The performance of non binary concatenated code depends on
Answer :
Symbols errors
Q9.
A code should be selected such that it should
Answer :
Not have catastrophic error propagation
Q10.
Soft decision results in
Answer :
Increase in complexity
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