东南大学学报（英文版）2004，Vol.20Issue(4)：401-404,4.
利用一种新LDPC码的编码OFDM系统性能分析
Performance analysis of coded OFDM systems using a novel class of LDPC codes
摘要
Abstract
A new method of constructing regular low-density parity-check (LDPC) codes is proposed. And the novel class of LDPC codes is applied in a coded orthogonal frequency division multiplexing (OFDM) system. This method extends the class of LDPC codes which can be constructed from shifted identity matrices. The method can avoid short cycles in Tanner graphs with simple inequation in the construction of shifting identity matrices, which makes the girth of Tanner graphs 8. Because of the quasi-cyclic structure and the inherent block configuration of parity-check matrices, the encoders and the decoders are practically feasible. They are linear-time encodable and decodable. The LDPC codes proposed have various code rates, ranging from low to high. They perform excellently with iterative decoding and demonstrate better performance than other regular LDPC codes in OFDM systems.关键词
正交频分复用(OFDM)/低密度奇偶校验(LDPC)码/置换矩阵/构造/迭代解码Key words
orthogonal frequency division multiplexing (OFDM)/low-density parity-check (LDPC) codes/permutation matrix/construction/iterative decoding分类
信息技术与安全科学引用本文复制引用
何善宝,张立,赵春明..利用一种新LDPC码的编码OFDM系统性能分析[J].东南大学学报（英文版）,2004,20(4):401-404,4.基金项目
Key Project of the National Natural Science Foundation of China (No. 60496311). （No. 60496311）
