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1、WirelessCommunicationsPrinciplesandPractice T.S.Rappaport 2ndEditionChapter2:ModernWirelessCommunicationSystems©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.1Growthofcellulartelephonesubscribersthroughouttheworld.©2002PearsonEduc
2、ation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.2Worldwidesubscriberbaseasafunctionofcellulartechnologyinlate2001.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleproh
3、ibited.Figure2.3Variousupgradepathsfor2Gtechnologies.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibite
4、d.Figure2.4Exampleoftheemergingapplicationsandmarketsforbroadbandservices.(CourtesyofHarrisCorporation,©1999,allrightsreserved.)©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.5Allocationofbroadbandwirelessspectrumthroughoutthework
5、.(CourtesyofRayW.NettletonandreproducedbypermissionofFormusCommunications.)©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.7AwirelessCompetitiveLocalExchangeCarr
6、ier(CLEC)usingAsynchronousTransferMode(ATM)distribution.©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.8Measuredreceivedpowerlevelsovera605m38GHzfixedwirelesslinkinclearsky,rain,andhail[from[Xu00],©IEEE].©2002PearsonEducation,Inc.
7、Commercialuse,distribution,orsaleprohibited.Figure2.9Measuredreceivedpowerduringrainstormat38GHz[from[Xu00],©IEEE].©2002PearsonEducation,Inc.Commercialuse,distribution,orsaleprohibited.Figure2.10OverviewoftheIEEE802.11WirelessLANstandard.©2002PearsonEducation,I
8、nc.Commercialuse,distribution,orsaleprohibited.Figure2.11Photographsofpopular802.11bWLANequipment.Accesspointsandaclientcardareshownonleft,andPCMCIAClientcardisshownonright.
