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RS码软判译码技术地研究.pdf

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AbstractRS(Reed-Solomon)codeisakindofperfectcode,munication,munication,icrecordingmedia,,******@ITOI',,theHDD(HardDecisionDecoding),thereisalotofdecodinggainlossbecausetheHDDdoesn’(SoftDecisionDecoding),—口吼nc刎【髓撕onSDDalgorithmsofRScodeareintroducedinthisthesis,suchastheASD(AlgebraicSoftDecision)algorithminventedbyKoetterandⅥ呐;lheABP(AaapaveBeliefPropagation)flgofithminvemⅨ!byYmgJiangandNarayanan’-concatenationdecodingalgorithms,wemainlydiscusstheSD(SphereDecoding)algorithmwhichisnewlysubmitted.‘Afterthis,wewillswitchourresearchtoconcatenationSDDdecodingalgorithmsofRScodewhichcanprovidebetterlkrformancethannon-,atthelastchapterofthisthesis,weproposetwonewconcatenationalgorithm:ABP--CHASEwhichistheconcatenationofABPalgorithmandCHASEalgorithmandABP··:Reed—SolomonCodes;SoRDecisionDecoding;Spheredecoding;AdaptiveBeliefPropagation;ConcatenationDecodingAlgorithmⅡABPALLRASDKNG憾BCHBDDBERBMBMABPCBCGAFERGFGⅣDGSHDDKVLRBMLDMRBOSDSDDRSSD缩略语词汇LlS’I’o-’ABBREVIA:I’umulatedLog—likelihoodRatio累积对数似然比AlgebraicSoftDecisionDecoding代数软判决译码AddedWhiteGaussianNoiseChannel加性高斯白噪声信道Bose,Chaudhuri&HocquenghemTypeof博斯一乔赫里-霍克文黑姆Code码BoundedDistanceDecoding限定距离译码BitErrorRatio误比特率Berlekamp-MasseyBM译码算法BoxAndMatchDecoding盒匹配译码算法Belief州on置信度传播ControlBand控制带Chase-IfGMDconcaten碰onAlgorithmChase-II与GMD的级联算法FrameErrorRate误帧率GaloisFieldGeneralMinimumDistanceDecodingO

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