| US 7,584,401 B2 | ||
| Channel interleaving/deinterleaving apparatus in a communication system using low density parity check code and control method thereof | ||
| Song-Nam Hong, Seoul (Korea, Republic of); Jung-Soo Woo, Suwon-si (Korea, Republic of); Seung-Hoon Park, Seoul (Korea, Republic of); Deok-Ki Kim, Seongnam-si (Korea, Republic of); Su-Ryong Jeong, Suwon-si (Korea, Republic of); Young-Kyun Kim, Seongnam-si (Korea, Republic of); and Dong-Seek Park, Yongin-si (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd, (Korea, Republic of) | ||
| Filed on Jul. 14, 2006, as Appl. No. 11/487,201. | ||
| Claims priority of application No. 10-2005-0064364 (KR), filed on Jul. 15, 2005. | ||
| Prior Publication US 2007/0033486 A1, Feb. 08, 2007 | ||
| Int. Cl. H03M 13/00 (2006.01) | ||
| U.S. Cl. 714—755 [714/786; 714/788; 714/762; 714/781] | 34 Claims |
| 1. A channel interleaving method in a communication system using a low density parity check (LDPC) code, the method comprising:
encoding information data bits into an LDPC codeword using a predetermined coding scheme upon receipt of the information bits;
interleaving the LDPC codeword according to a predetermined channel interleaving rule; and
modulating the channel-interleaved LDPC codeword into a modulation symbol using a predetermined modulation scheme,
wherein the channel interleaving rule is defined such that if a degree of a check node is lower than a threshold set in the
system, codeword bits mapped to low-degree variable nodes are allocated to higher-reliability bits among the bits in the modulation
symbol.
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