摘要
低密度奇偶校验码(LDPC codes)码是一种性能接近香浓限得线性分组码,而准循环低密度奇偶校验码(QC-LDPC codes)是LDPC码的一个重要子类。本文中,我们提出了一种基于QC-LDPC码的改进码型,仿真结果表明在中长帧长时改进码型的性能要优于QC-LDPC码,且由于其该码的特殊结构,该码较之与QC-LDPC码更易于编码器实现。
Low-Density Parity - Check （ LDPC ） code is a good linear block codes, which performs at a rate extremely close to Shannon capac- ity. Quasi-cyclic （QC） LDPC form an important subclass of LDPC codes. In this paper,we present an improved structure of QC-LDPC codes. It is shown that the performance of the improved code is even better than QC-LDPC codes in moderate and long frame length. And because of its structure,the encoding implemention is more suitable than QC-LDPC codes.
出处
《世界科技研究与发展》
CSCD
2008年第5期571-573,共3页
World Sci-Tech R&D
