Channel interleaving/deinterleaving for a communication system using a low density parity check (LDPC) code

摘要

In a communication system, information data bits are encoded in a preset coding scheme when the information data bits are input, and a Low Density Parity Check (LDPC) codeword is generated. The LDPC codeword is interleaved according to a preset channel interleaving rule. A channel-interleaved LDPC codeword is modulated in a preset high-order modulation scheme and a modulation symbol is generated. The channel interleaver is designed using the unequal error characteristics of the high-order modulation scheme, whereby the cycle size and the characteristics of the node degree of the LDPC codes is considered.