Patent ID: 8161363

Claim:
A method to generate a parity check matrix of a block Low Density Parity Check (LDPC) code by a communication apparatus in a communication system, the method comprising: generating, by the communication apparatus, at least one of a 1 st parity check matrix and a 2 nd parity check matrix used for encoding an information vector as the block LDPC code, wherein the 1 st parity check matrix is generated using a 2 nd parity check matrix, the 2 nd parity check matrix includes a plurality of blocks, the plurality of blocks are classified into blocks corresponding to an information part corresponding to the information vector, blocks corresponding to a 1 st parity part corresponding to a 1 st parity vector, blocks corresponding to a 2 nd parity part corresponding to a 2 nd parity vector, and blocks corresponding to a 3 rd parity part corresponding to a 3 rd parity vector, wherein when the information vector includes a 1 st information vector and a 2 nd information vector, the blocks classified as the information part are classified into blocks corresponding to a 1 st information part corresponding to the 1 st information vector and blocks corresponding to a 2 nd information part corresponding to the 2 nd information vector, wherein the blocks classified as the 1 st information part are classified into blocks corresponding to a 1 st partial block, blocks corresponding to a 2 nd partial block, and blocks corresponding to a 3 rd partial block, wherein the blocks classified as the 2 nd information part are classified into blocks corresponding to a 4 th partial block, blocks corresponding to a 5 th partial block, and blocks corresponding to a 6 th partial block, wherein the blocks classified as the 1 st parity part are classified into blocks corresponding to a 7 th partial block, blocks corresponding to a 8 th partial block, and blocks corresponding to a 9 th partial block, wherein the blocks classified as the 2 nd parity part are classified into blocks corresponding to a 10 th partial block, blocks corresponding to a 11 th partial block, and blocks corresponding to a 12 th partial block, wherein the blocks classified as the 3 rd parity part are classified into blocks corresponding to a 13 th partial block, blocks corresponding to a 14 th partial block, and blocks corresponding to a 15 th partial block, and wherein the 15 th partial block is diagonal with the 11 th partial block block-by-block, identity matrixes are arranged in blocks corresponding to the 15 th partial block.