摘要
Low-DensityParity-Check(LDPC)codeisoneofthemostexcitingtopicsamongthecodingtheorycommunity.Itisofgreatimportanceinboththeoryandpracticalcommunicationsovernoisychannels.ThemostadvantageofLDPCcodesistheirrelativelylowerdecodingcomplexitycomparedwithturbocodes,whilethedisadvantageisitshigherencodingcomplexity.Inthispaper,anewap-proachisfirstproposedtoconstructhighperformanceirregularsystematicLDPCcodesbasedonsparsegeneratormatrix,whichcansignificantlyreducetheencodingcomplexityunderthesamede-codingcomplexityasthatofregularorirregularLDPCcodesdefinedbytraditionalsparseparity-checkmatrix.Then,theproposedgenerator-basedsystematicirregularLDPCcodesareadoptedascon-stituentblockcodesinrowsandcolumnstodesignanewkindofproductcodesfamily,whichalsocanbeinterpretedasirregularLDPCcodescharacterizedbygraphandthusdecodediteratively.Finally,theperformanceofthegenerator-basedLDPCcodesandtheresultantproductcodesisinvestigatedoveranAdditiveWhiteGaussianNoise(AWGN)andalsocomparedwiththeconventionalLDPCcodesunderthesameconditionsofdecodingcomplexityandchannelnoise.
出版日期
2007年05月15日（中国期刊网平台首次上网日期，不代表论文的发表时间）
