基于功率譜分析的光盤(pán)調(diào)制編碼性能評(píng)價(jià)與優(yōu)化

1、華中科技大學(xué)碩士學(xué)位論文基于功率譜分析的光盤(pán)調(diào)制編碼性能評(píng)價(jià)與優(yōu)化姓名：葉真申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：計(jì)算機(jī)系統(tǒng)結(jié)構(gòu)指導(dǎo)教師：胡迪青20080604II華中科技大學(xué)碩士學(xué)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