标签: antnnna

AdaptiveAntnnnaAdaptiveAntennaTutorial:SpectralEfficiencyandSpatialProcessingFCCOfficeofEngineeringandTechnology7September2001MarcGoldburgCTO,InternetProductsGroupArrayComm,Inc.http://www.arraycomm.commarcg@arraycomm.com1CellularTechnologybasestationcell!Cellularnetworksdivideacoverageareaintomultiple“cells”!eachhasitsownradioinfrastructureandusers!Basisformosttwo-waywirelessservices!!sectorcellularphones(1G,2G,3G,…)MMDSbroadbanddata(Sprint,Worldcom)WirelessLANsLMDSbroadbanddata(Teligent,Winstar,…)TelephonyNetworksBackhaulNetworkSwitching/Switching/RoutingRouting!!DataNetworks2MotivationForThisTalk!Cellularsystemdesigntradesoffcompetingrequirements"""""""servicedefinitionserv……