Quasi-cyclic LDPC codes with high-rate and low error floor based on Euclidean geometries
- 作者：Yuan-hua LIU ; yuanhliu@163.com ; Mei-ling ZHANG ; Jiu-lun FAN
- 关键词：low-density parity-check codes ; quasi-cyclic ; Euclidean geometry
- 刊名：The Journal of China Universities of Posts and Telecommunications
- 出版年：2012
- 期刊代码：17_10058885
- 类别：et
- 出版时间：April, 2012
- 卷：19
- 期：2
- 页码：96-99
- 文件大小：135 K
摘要
An improved Euclidean geometry approach to design quasi-cyclic (QC) Low-density parity-check (LDPC) codes with high-rate and low error floor is presented. The constructed QC-LDPC codes with high-rate have lower error floor than the original codes. The distribution of the minimum weight codeword is analyzed, and a sufficient existence condition of the minimum weight codeword is found. Simulations show that a lot of QC-LDPC codes with lower error floor can be designed by reducing the number of the minimum weight codewords satisfying this sufficient condition.