《通信科普》PPT课件.ppt

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1、HistoryOfMobileCommunicationAbisAInterfaceMSBSSOMC-RBSCMSCBTSBTSBTSMSMSUm2011.10.012ContactMethodSpeakerTianJinUniversitySchoolOfElectronicAndInformationEngineeringAddress：Telephone：E-mail：3Ratet3G2G4GAnalogTrend4MainContentFirstGeneration12ndGeneration23rdGeneration3Beyond3G45M

2、ainContentFirstGeneration12ndGeneration23rdGeneration3Beyond3G461FirstGenerationMobileCommunicationBoredin70sTechnologyFDMAAnalogvoicemodulation7FDMAPrinciplefrequencytime81Featuresof1G1GLesssecureAnalogcellularsystemsPronetoInterferenceOnlycarryvoicetrafficPoorcallquality9Main

3、ContentFirstGeneration12ndGeneration23rdGeneration3Beyond3G41022ndGenerationBecentreofvoicetransmissiontechnologyGSMphoneCDMAphone11CellularNetworks12CellularNetworks132GMeritsDigitalcellularsystemsSupportinghighbitratevoice,limiteddatacommunicationImprovedquality14MainContentFi

4、rstGeneration12ndGeneration23rdGeneration3Beyond3G41533rdGenerationcharacteristic(1/6)Highestspeedenhancethequalityandclarity16highlightsofpopularsportsandshows33rdGenerationcharacteristic(2/6)Flexiblewirelessaccess17Fasterconnectivity,musicentertainmentbetterqualityandfasteracc

5、esstotheinternet33rdGenerationcharacteristic(3/6)18featurehighlightsofpopularsports33rdGenerationcharacteristic(4/6)19Movieclips33rdGenerationcharacteristic(5/6)20Veryquickdownloads33rdGenerationcharacteristic(6/6)21MainContentFirstGeneration12ndGeneration23rdGeneration3Beyond3G

6、4224Beyond3GStrongflexibilityHighspeedHighlyself-organizingandadaptivenetworkGreencommunication2344GHighspeed244Greencommunication25Thankyou