Method and apparatus for encoding and decoding low density parity check codes
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United States of America Patent
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Mar 19, 2019
Grant Date -
Jan 25, 2018
app pub date -
Oct 2, 2017
filing date -
May 19, 2015
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Abstract
A transmitting apparatus encodes information bits using a low density parity check (LDPC) encoder, which is configured to encode information bits to generate parity bits based on a parity check matrix. In some embodiments, the code rate is 8/15 and the code length is 64800. The transmitting apparatus also includes an interleaver configured to interleave an LDPC codeword including the information bits and parity bits and a mapper configured to map the interleaved LDPC codeword onto constellation points. In some embodiments, the parity check matrix comprises an information matrix part corresponding to the information bits and a parity matrix part corresponding to the parity bits. In some embodiments, the information matrix part is defined by a specific table indicating indices of rows at which a value “1” is positioned in a 0-th column of an i-th column group in the parity check matrix.
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