基于VHDL语言的HDB3码的编码和译码文档格式.doc
《基于VHDL语言的HDB3码的编码和译码文档格式.doc》由会员分享，可在线阅读，更多相关《基于VHDL语言的HDB3码的编码和译码文档格式.doc（44页珍藏版）》请在冰豆网上搜索。
关键词HDB3VHDL编码译码
I
Abstract
TheElectronicDesignAutomation（EDA）technologyhasbecomeanimportantdesignmethodofanaloganddigitalcircuitsystemgrowing.OneimportantcharacteristicoftheEDAAsistheintegratedcircuitoneofthestandarddescriptionlanguagesvalidatedbyIEEE，whichwasfirstlyintroducedin1982.Anditwaswidelyusedbyelectronicdesignernow.
Therequirementsofdigitalbasebandsignalsaretwopoints,Thefirstistherequirementofvariouscode,expectedthepreparationoftheoriginalinformationsymbolsusedtopatterninaformsuitablefortransmission;
Thesecondistherequirementsofthepatternoftheselectedwaveform,expectedwaveformsuitablefortransmissioninthechannel.TheHDB3codingschemeiscommonlyusedindigitalbasebandtransmission.TheHDB3code，whichhasfeaturesofzeroDCbiasviaalternatingpositive-negativevoltagelevelbitbybitandnomorethanthreecontinuous-zerobits，deducesthepowerdissipationandmakesthereceivingdeviceeasytorecovertheclockinthetransmittedcodestream.somymajorcontentofgraduateddesignisdesigningbasedontheHDB3volume/decoderofVHDLlanguage，therequirementthatitwillreachisthebasicskillthatcanrealizeHDB3volume/decoderfunctioninsoftwarecan，andcancoordinateentiredesign，makesureitreachtherequirementthatanticipated.ThisdesigninQuartusIIdevelopmentenvironmentusesVHDLlanguagetodesignHDB3encoderanddecoder.Accordingtotheencodingrules,therearethreepartsindecoder:
insertthemoduleV,insertthemoduleB,theunipolarvariablebipolarmodule..Accordingtothedecodingrules,decodercontainsonlyonemodule.Finally,thesimulationofeachmodule,itachievethecorrespondingfunctionandthenachievethewholesimulation.
KeywordsVHDLHDB3EncodingDecoding
38
目录
摘要 I
Abstract II
第1章绪论 1
1.1研究目的和意义 1
1.2基带传输码型简介 2
1.2.1AMI码 2
1.2.2数字双相码 2
1.2.3NRZ码 3
1.3VHDL语言简介 3
1.3.1VHDL定义 3
1.3.2功能和特征 4
1.3.3应用优点 4
1.4QuartusⅡ简介 4
1.4.1QuartusII的产生与发展 4
1.5本设计的研究内容 6
第2章HDB3码的编/译码的规则 7
2.1HDB3码简介 7
2.1.1HDB3码定义 7
2.1.2HDB3码特点 7
2.2HDB3码编解码器的国内外发展情况 8
2.3HDB3码的应用 9
2.3.1HDB3码测井电缆遥传系统中的应用 9
2.3.2HDB3码高速长距离通信 9
2.3.3HDB3码在基带数据传输中的应用 10
2.4HDB3码的编码规则 10
2.5HDB3码的译码规则 10
2.6本章小结 11
第3章HDB3码编码器的建模与实现 12
3.1插V模块的建模与实现 12
3.1.1设计思路 12
3.1.2程序设计 13
3.1.3仿真结果 14
3.2插B模块的建模与实现 15
3.2.1设计思路 16
3.2.2程序设计 17
3.2.3仿真结果 19
3.3单极性变双极性的建模与实现 20
3.3.1设计思路 20
3.3.2程序设计 21
3.3.3仿真波形 22
3.4编码器的仿真 23
3.5本章小结 24
第4章HDB3译码器设计 26
4.1设计思路 26
4.2程序设计 27
4.3译码器的仿真 27
4.4本章小结 28
结论 30
致谢 31
参考文献 32
附录1 33
附录2 37
CONTENTS
Abstract（Chinese） I
Chapter1Introduction 1
1.1ThePurposeAndSignificanceOfTheResearch 1
1.2TheIntroductionOfBasebandAndTransmissionCode 2
1.2.1AMICode 2
1.2.2DigitalPhaseCode 2
1.2.3NRZCode 3
1.3VHDLIntroduction 3
1.3.1VHDLdefined 3
1.3.2Functionsandfeatures 4
1.3.3ApplicationAdvantages 4
1.4QUARTUSⅡIntroduction 4
1.4.1ProductionAndDevelopmentOfQuartus 4
1.5TheContentOfTheDesign 6
Chapter2TheRulesOfHDB3CodeEncoding/Decoding 7
2.1IntroductionOfTheHDB3Code 7
2.1.1HDB3CodeDefinition 7
2.1.2HDB3CodeFeatures 7
2.2HDB3CodeCodecDevelopmentAthomeAndAbroad 8
2.3ApplicationsOfTheHDB3Code 9
2.3.1ApplicationsofHDB3CodeLoggingCableTelemetrySystem 9
2.3.2HDB3CodeHigh-speedLongDistanceCommunications 9
2.3.3ApplicationsOfHDB3CodeInTheBase-bandTransmission 10
2.4EncodingRulesOfHDB3Code 10
2.5DecodingRulesOfHdb3Code 10
2.6ChapterSummary 11
Chapter3ThemodelingAndImplementationOfHDB3Encoder 12
3.1InsertedModelingAndImplementationOftheModuleV 12
3.1.1TheDesignIdeas 12
3.1.2TheProgramming 13
3.1.3TheSimulationResults 14
3.2InsertedModelingAndImplementationOfTheModuleB 15
3.2.1DesignIdeas 16
3.2.2Programming 17
3.2.3SimulationResults 19
3.3IntoaBipolarUnipolarModelingAndImplementation 20
3.3.1TheDesignIdeas 20
3.3.2TheProgramming 21
3.3.3TheSimulationResults 22
3.4EncoderSimulation 23
3.5ChapterSummary 24
Chapter4ThedesignofHDB3Decoder 26
4.1TheDesignConcept 26
4.2TheProgramming 27
4.3DecoderSimulation 27
4.4ChapterSummary 28
Conclusions 30
Acknowledgements 31
References 32
Appendix1 33
Appendix2 37
第1章绪论
数字通信的主要特点：
抗干扰能力强，尤其是数字信号通过中继再生后可消除噪声积累；
数字
升级会员 