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1、同濟大學電子與信息工程學院博士學位論文DVB-C基帶芯片的設計與實現姓名:史曉鋒申請學位級別:博士專業(yè):控制理論與控制工程指導教師:陳詠恩20070301摘要4,簡單回顧基于隨機梯度迭代的盲均衡算法,重點討論獨立于載波的常模數算法。從均衡器是否包含反饋以及反饋的方式、采用直接型或者倒置型濾波器結構、采用符號間隔還是分數間隔這三個方面,分析不同結構均衡器的特點。給出采用不同算法和結構均衡器的性能仿真結果。5,研究在混合信號電路(AGC和ADC)設計過程中面臨的主要問題和解決方法。提出芯片中固定系數FIR濾波器和均衡器等關鍵模塊的優(yōu)化實現方案。設計結果表明這
2、些優(yōu)化保證了解調器的整體性能指標。6,研究基于SystemC的定點仿真技術和基于參考模型的功能驗證,提出時序精度層次的參考模型。對基于FPGA的原型驗證系統(tǒng)的組成、流程和一些基本驗證準則進行了討論。以DVB.C基帶芯片為實例,針對基帶芯片驗證中的難點提出相應策略。關鍵詞:正交幅度調制、時鐘同步、插值、載波同步、自適應均衡、混合信號、SystemC參考模型、FPGA驗證nAbstractDVB—ChasbeenthenationalstandardofdilgitalCableTVinourcountry.WithsteppingintoHDTVe豫fro
3、manalogTV,theincreasinglyrequirementofdemodulatorchipswithhi曲performanceisevident.TheVLSIdesignofdemodulatorchiphasbecomeoneofthefocusesofacademicandindustrialresearch.Sincecoaxial-cableisthetransmissionmedia,QuadratureAmplitudeModulation,whichworkswellintheinvirenmentofhighsigna
4、ltonoiseratio,isusedinDVB··Cstandard,andDVB··Cbasebandchipissubsequentlyawide-bandQAMdemodulator.QAMmodemhasbeenwidelyusedintelephonechannel,andresearchesnowfocusontheareaofwide-bandcommunication、玩tlllliglldatarate.Althoughtherearemanyproductionsintheseyears,wealsofacetoanumberof
5、unresolvedtechnologydifficulties.AsCableTVnetisatypicalbroadcastnet,transmittersCannotprovidetrainingsequencetousersthatprobablyconnectinmomentarily,andthereisnoinformationwimpreviousknowledgeintransmissioncontent.Soblindreceivingisoneofthekeyproblemsofthisdissertation.Withthegre
6、atprogressoflCtechnology,scaleofchipsandcomplexityofdesignarekeepingincrease.VerificationbecomesoneofthemostdifficultandchallengingprobleminICdesign,andbecomesthekeyfactorindesignperiods.ThisdissertationfocusesonDVB-Cbasebandchipdesign,butnotlimitedonit.Commonproblemsofdesignandv
7、erificationinQAMdemodulatorsaresolvedbydoingresearchonsynchronization,equalizationandotherkeytechniquesinQAMdemodulationandlargeamountofverificationwork.TheproductionsCanbeimplementedinHDTV,cablemodem,satellite,microwavecommunicationetalthatbasedonQAdVI,andgivedirectionandreferen
8、cetocommunicationbase-bandchipdesign.The