DVBC基带芯片的设计与实现

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1、同济大学电子与信息工程学院博士学位论文DVB-C基带芯片的设计与实现姓名：史晓锋申请学位级别：博士专业：控制理论与控制工程指导教师：陈咏恩20070301摘要4，简单回顾基于随机梯度迭代的盲均衡算法，重点讨论独立于载波的常模数算法。从均衡器是否包含反馈以及反馈的方式、采用直接型或者倒置型滤波器结构、采用符号间隔还是分数间隔这三个方面，分析不同结构均衡器的特点。给出采用不同算法和结构均衡器的性能仿真结果。5，研究在混合信号电路(AGC和ADC)设计过程中面临的主要问题和解决方法。提出芯片中固定系数FIR滤波器和均衡器等关键模块的优化实现方案。设计结果表明这

2、些优化保证了解调器的整体性能指标。6，研究基于SystemC的定点仿真技术和基于参考模型的功能验证，提出时序精度层次的参考模型。对基于FPGA的原型验证系统的组成、流程和一些基本验证准则进行了讨论。以DVB．C基带芯片为实例，针对基带芯片验证中的难点提出相应策略。关键词：正交幅度调制、时钟同步、插值、载波同步、自适应均衡、混合信号、SystemC参考模型、FPGA验证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