Let

denote the symbol permutation which, for each i, replaces symbol Si by symbol s~, and let

be the positional permutation which moves the symbol in position j to the new position j'.

C is the code {bddac, abcda, abbbc, cdcdc, caddb, bccca}.

Construct the equivalent code Cl by applying the position permutation o i ~ ~ ~), then to the result of this apply the symbol permutation

( a b c d)' 't' 4 a d beIn POS1 IOn .

Then construct the equivalent code C2 by applying the same two transformations to C, but in the reverse order.

Transcribed Image Text:

$1 $2 83 Sq