Improved Information Nulling Algorithm and Extending Check Matrix Algorithm for Rate Compatible LDPC Codes

摘要：

This paper focuses on two rate compatible algorithms that make the code rate of Low-Density Parity Check (LDPC) code lower, the Extending Check Matrix algorithm (ECMA) and the Information Nulling algorithm (1NA). ECMA adds new parity check bits, while INA replaces several information bits with dummy bits that are known to decoder. Theoretical analysis and simulation results indicate that for irregular LDPC code. INA can be improved remarkably by padding the coded bits with lower degree first. Further comparison implies that improved INA and ECMA may complement each other. For a specific target coding rate, ECMA is suitable for coarse rate compatible (RC) in a wide range of coding rate, and improved INA is fit for fine rate adjustment. Thus the code rate of RC-LDPC codes can be lowered bit by bit, just as the puncturing algorithms rise the coding rate.

关键词： LDPC code rate compatible schemes improved information nulling algorithm extending check matrix algorithm

作者: Hui Jiang Xiang Chen Shijiang Huang

作者单位: Dept.of Information Technologies Hefei Electronic Engineering Institute Hefei,China Dept. of Information Technologies Hefei Electronic Engineering Institute Hefei,China Dept. of Information Technologies Hefei Electronic Engineering Institute Hefei, China

会议类型: 国际会议

会议名称: 2011 International Conference on Communication and Electronics Information(ICCEI 2011)(2011年通信和电子信息国际会议)

会议地点: 海口

会议语种:英文

页码: 256-260

在线出版日期: 2011-02-22（万方平台首次上网日期，不代表论文的发表时间）