移动通信原理1 (2).ppt

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1、IntroductionChapter1WirelessComesofAgeGuglielmoMarconiinventedthewirelesstelegraphin1896CommunicationbyencodingalphanumericcharactersinanalogsignalSenttelegraphicsignalsacrosstheAtlanticOceanCommunicationssatelliteslaunchedin1960sAdvancesinwirelesstechnologyRadio

2、,television,mobiletelephone,communicationsatellitesMorerecentlySatellitecommunications,wirelessnetworking,cellulartechnologyBroadbandWirelessTechnologyHigherdataratesobtainablewithbroadbandwirelesstechnologyGraphics,video,audioSharessameadvantagesofallwirelessser

3、vices:convenienceandreducedcostServicecanbedeployedfasterthanfixedserviceNocostofcableplantServiceismobile,deployedalmostanywhereLimitationsandDifficultiesofWirelessTechnologiesWirelessisconvenientandlessexpensiveLimitationsandpoliticalandtechnicaldifficultiesinh

4、ibitwirelesstechnologiesLackofanindustry-widestandardDevicelimitationsE.g.,smallLCDonamobiletelephonecanonlydisplayingafewlinesoftextE.g.,browsersofmostmobilewirelessdevicesusewirelessmarkuplanguage(WML)insteadofHTMLPartOne:BackgroundProvidespreviewandcontextforr

5、estofbookCoversbasictopicsDataCommunicationsTCP/IPChapter2:TransmissionFundamentalsBasicoverviewoftransmissiontopicsDatacommunicationsconceptsIncludestechniquesofanaloganddigitaldatatransmissionChannelcapacityTransmissionmediaMultiplexingChapter3:CommunicationNet

6、worksComparisonofbasiccommunicationnetworktechnologiesCircuitswitchingPacketswitchingFramerelayATMChapter4:ProtocolsandtheTCP/IPProtocolSuiteProtocolarchitectureOverviewofTCP/IPOpensystemsinterconnection(OSI)referencemodelInternetworkingPartTwo:WirelessCommunicat

7、ionTechnologyUnderlyingtechnologyofwirelesstransmissionEncodingofanaloganddigitaldataforwirelesstransmissionChapter5:AntennasandPropagationPrinciplesofradioandmicrowaveAntennaperformanceWirelesstransmissionmodesFadingChapter6:SignalEncodingTechniquesWirelesstrans

8、missionAnaloganddigitaldataAnaloganddigitalsignalsChapter7:SpreadSpectrumFrequencyhoppingDirectsequencespreadspectrumCodedivisionmultipleaccess(CDMA)Chapter8:C