Research on Designing Encoder for a Class of LDPC Codes with Low-Complexity and High-Performance
Qiongxia Shen · Microelectronics & Computer · 2010
In this paper,a novel method based on Column-Difference Search Algorithm and Iterative Filled Algorithm is proposed to design Quasi-Cyclic LDPC codes with arbitrary girth and code rate.Due to its almost lower triangular form,CI-LDPC code has linear encoding complexity.The experimental results show that CI-LDPC codes perform better than Tanner codes and Array codes,which are another two classical QC-LDPC codes,and random codes.The code in this paper outperforms random code,Tanner code and Array code by 1.4dB～3.8dB.