Doped low-density parity-check codes  

作　　者：Yong Li Rui Liu Xianlong Jiao Youqiang Hu Zhen Luo Francis C.M.Lau 

机构地区：[1]College of Computer Science,Chongqing University,Chongqing,400044,China [2]School of Automation,Chongqing University,Chongqing,400044,China [3]College of Electronic and Information Engineering,Southwest University,Chongqing,400715,China [4]Future Wireless Networks and IoT Focusing Area,Department of Electronic and Information Engineering,Hong Kong Polytechnic University,Hong Kong,China

出　　处：《Digital Communications and Networks》2024年第1期217-226,共10页数字通信与网络（英文版）

基　　金：supported in part by China NSF under Grants No.61771081 and 62072064;the Fundamental Research Funds for the Central Universities(China)under Grant cstc2019jcyjmsxmX0110;the Project of Chongqing Natural Science Foundation under Grant CSTB2022NSCQ-MSX0990;Science and Technology Research Project of Chongqing Education Commission under Grant KJQN202000612;the Venture and Innovation Support Program for Chongqing Overseas Returnees under Grant cx2020070.

摘　　要：In this paper,we propose a doping approach to lower the error floor of Low-Density Parity-Check(LDPC)codes.The doping component is a short block code in which the information bits are selected from the coded bits of the dominant trapping sets of the LDPC code.Accordingly,an algorithm for selecting the information bits of the short code is proposed,and a specific two-stage decoding algorithm is presented.Simulation results demonstrate that the proposed doped LDPC code achieves up to 2.0 dB gain compared with the original LDPC code at a frame error rate of 10^(-6)Furthermore,the proposed design can lower the error floor of original LDPC Codes.

关 键 词：LDPC codes Doped LDPC codes Tanner graph Quadratic residue codes Trapping sets 

分 类 号：TN918.4[电子电信—通信与信息系统]