基于功率譜分析的光盤調(diào)制編碼性能評價與優(yōu)化

1、華中科技大學碩士學位論文基于功率譜分析的光盤調(diào)制編碼性能評價與優(yōu)化姓名：葉真申請學位級別：碩士專業(yè)：計算機系統(tǒng)結構指導教師：胡迪青20080604II華中科技大學碩士學位論文AbstractInopticaldiscsystemtheperfmanceofchannelcodehasagreatimpactonchannelperfmancewhichisoneofthefactsrequiringcarefulconsideratio

2、ninopticaldiscstard.RunLengthLimitedcodeisoneofmodulationcodeswhichiswidelyusedinopticaldiscsystem.Powerspectrumisanimptantaspectinevaluatingperfmanceofmodulationcode.Therefethestudyofspectralperfmanceofmodulationcodehas

3、greatsignificance.OnthebasisofintroducingthetheiesofRunLengthLimitedcodebrieflyanalyzingbasicmodeltechnologyofopticalrecodingchannelthepowerspectrumcomputationmethodsofthreedifferentRunLengthLimitedsequenceshavebeenstudi

4、edtheiradvantagesdisadvantageshavebeenanalyzed.ThemethodwhichisbasedononestepstatetransitionmatrixisproposedtobeusedtocomputepracticalRunLengthLimitedcode.Withtheimplementationofthepowerspectrumcomputationmethodbasedonon

5、estepstatetransitionmatrixthepowerspectrumsof3PMLookAheadcodeEFMPLUScodearecomputedindertovalidatetheeffectivenesscrectnessofthemethod.InNextGenerationVersatileDiscRLL（212815）codeRLL（11046）codewithindependentintellectual

6、propertyrightsareusedasopticalchannelcodeInrespecttothetwocodethemethodbasedononestepstatetransitionmatrixisusedtoanalyzethepowerspectrumofthecodesrespectivelytheimplementationproceduresarepresented.Thespectrumperfmancea

7、nalysisoftheRunLengthLimitedcodeisfocusonthelowfrequencycomponentsuppressionthetransmissionefficiencyoneverythefrequency.Onthebasisofabovethecodeisimprovedindertogetabetterspectrumperfmance.Accdingtothecomparisonofpowers