Apparatus and method for channel encoding/decoding in communication or broadcasting system

An apparatus for channel decoding in a communication or broadcasting system, the apparatus comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• identify a block size, and
• perform a decoding procedure based on a first matrix corresponding to the block size,
• wherein the first matrix is identified based on a base matrix and a plurality of second matrices, and
• wherein a column index of corresponds to a non-zero element in each row of the information base matrix, and the base matrix has following values as column indices,
• {0 1 2 3 5 6 9 10 11 12 13 15 16 18 19 20 21 22 23}
• {0 2 3 4 5 7 8 9 11 12 14 15 16 17 19 21 22 23 24}
• {0 1 2 4 5 6 7 8 9 10 13 14 15 17 18 19 20 24 25}
• {0 1 3 4 6 7 8 10 11 12 13 14 16 17 18 20 21 22 25}
• {10 1 26}
• {0 1 3 12 16 21 22 27}
• {0 6 10 11 13 17 18 20 28}
• {0 1 4 7 8 14 29}
• {0 1 3 12 16 19 21 22 24 30}
• {0 1 10 11 13 17 18 20 31}
• {1 2 4 7 8 14 32}
• {0 1 12 16 21 22 23 33}
• {0 1 10 11 13 18 34}
• {0 3 7 20 23 35}
• {0 12 15 16 17 21 36}
• {0 1 10 13 18 25 37}
• {1 3 11 20 22 38}
• {0 14 16 17 21 39}
• {1 12 13 18 19 40}
• {0 1 7 8 10 41}
• {0 3 9 11 22 42}
• {1 5 16 20 21 43}
• {0 12 13 17 44}
• {1 2 10 18 45}
• {0 3 4 11 22 46}.