The research of LDPC code in communication system

摘要：

　　Low-Density Parity-Check(LDPC) codes are a class of channel codes based on matrix encoding and iterative decoding.It has low decoding complexity as well as capacity approaching performance.Until now,the best designed LDPC codes can achieve the performance within only 0.0045dB of the Shannon limit.With the in-depth study,the encoding complexity of LDPC codes is not a difficult problem for application any more.Today,we can see LDPC codes widely used in many practical systems,such as wireless communication system,deep-space communication system,optical-fiber communication system and media storage system.This thesis first introduces the development of channel coding,and then the basic principles and concepts of LDPC codes.The following parts discuss several techniques of LDPC codes,including the construction methods of low-density parity matrix,the iterative decoding algorithms and performance analysis methods.Besides,we propose our opinions and our improved algorithms.

关键词： Low-Density Parity-Check Codes linear block code Bit-Flipping matrix Channel coding

作者: Dan Hu

作者单位: Guizhou university institute of computer science and informationGuiyang,China

会议类型: 国际会议

会议名称: 2012 2nd international Conference on Materials Science and Information Technology(2012第二届材料科学与信息技术国际会议)(MSIT2012)

会议地点: 西安

会议语种:英文

页码: 1135-1139

在线出版日期: 2012-08-24（万方平台首次上网日期，不代表论文的发表时间）