1.What
is meant by encoder and decoder?
The encoder adds redundant bits to
the sender’s bit stream to create a codeword. The decoder uses the redundant
bits to detect and/or correct as many bit errors as the particular
error-control code will allow.
2.What
is meant by error control code?
A set of code-words used with an
encoder and decoder to detect error, correct error, or both detect and correct
error.
3.Define
code word.
The encoder blocks of ‘n’ bits is
called as code word.
Code word=Message bits + Redundant
bits
4.What
is meant by code efficiency?
It is the ratio message bits in a
block to the transmitted bits for the block by the encoder.
5.What
are the types of error control coding?
-Forward Error Correction
-Automatic Repeat Request
