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Question

The code words at the output of channel encoder of a (6, 2) linear block code (LBC) are given as follows:

c0=[000000];c1=[010010];c2=[101101];c3=[111111]

The minimum distance (dmin) of the given LBC is equal to_______
  1. 2

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Solution

The correct option is A 2
The minimum distance (dmin) of a code can be defined as
''The smallest value of the Hamming distance between any pair of code words in the given coding system''

or

''The smallest Hamming weight of non-zero code words in the given coding system''

For the given code,
ci Code word Hamming weight of the code word
c0 000000 0
c1 010010 2
c2 101101 4
c3 111111 6

From the above table, it is clear that the smallest Hamming weight of non-zero code word is 2.

So, the minimum distance (dmin) of the given LBC is 2.

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