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1、WirelessCommunicationsPrinciplesandPractice T.S.Rappaport2ndEditionChapter2:ModernWirelessCommunicationSystems©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.1Growthofcellulartelephonesubscribersthroughouttheworld.©2002PearsonEducation,Inc.Commercialus
2、e,distribution,orsaleprohibited.Figure2.2Worldwidesubscriberbaseasafunctionofcellulartechnologyinlate2001.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.3Variousupgradepathsfor2Gtec
3、hnologies.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.4Exampleoftheemergingapplicationsandmarketsforbroadban
4、dservices.(CourtesyofHarrisCorporation,©1999,allrightsreserved.)©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.5Allocationofbroadbandwirelessspectrumthroughoutthework.(CourtesyofRayW.NettletonandreproducedbypermissionofFormusCommunications.)©2002Pears
5、onEducation,Inc.Commercialuse,distribution,orsaleprohibited.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.7AwirelessCompetitiveLocalExchangeCarrier(CLEC)usingAsynchronousTransferMode(ATM)distribution.©2002PearsonEducation,Inc.Commercialuse,distributi
6、on,orsaleprohibited.Figure2.8Measuredreceivedpowerlevelsovera605m38GHzfixedwirelesslinkinclearsky,rain,andhail[from[Xu00],©IEEE].©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.9Measuredreceivedpowerduringrainstormat38GHz[from[Xu00],©IEEE].©2002Pearson
7、Education,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.10OverviewoftheIEEE802.11WirelessLANstandard.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.11Photographsofpopular802.11bWLANequipment.Accesspointsandaclientcardareshownonleft,andPCMCIA
8、Clientcardisshownonright.(
