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ID:37813789
大小:57.95 KB
页数:7页
时间:2019-05-31
《2.4GHz DSSS WLAN Cascade Analysis》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2.4GHzDirectSequenceTMWirelessLANCascadeAnalysisApplicationNoteMay2000AN9810.1Authors:RobertRood,DougSchultz-5Abstract(SNR)fora10BitErrorRate(BER).TheCSMA/CAprotocolallowsonlyoneuser,perchannel,atatime(i.e.,Thepaperdescribesthecascadefirstcome,firstserve)makingforaquietermedium.TheanalysisofanIEEE
2、802.11directprocessinggain,achievedbyspreadingthesignalwithasequencewirelessLANradiointhePNcode,allowsafaintsignaltobepulledfromthenoise2.4GHzISMband.Astepbystepwhilesuppressingnon-correlatinginterferers.approachistakenincluding:Basicsystemarchitecturedecisions,gaindistribution/IFlimiteranalysisan
3、dfinallytheAsingleantennaisused,althoughtwoantennasarecompletecascadeanalysis.ImportantRFparametersforsupportedfordiversitytocountertheeffectsofmulti-patheachfunctionblockinboththereceiveandtransmitchainsfading.Fromtheantenna,thereceivedinputisappliedtoareevaluatedandthedesigntrade-offsareexplored
4、.thepre-selectfilterFL1.Thisfilterisatwopoledielectricdesign,rejectinginterferersoutsidethe2.4GHzISMbandIntroductionandprovidingimagerejection.WirelessLocalAreaNetwork(WLAN)iscomingontotheTheT/RswitchisintegratedintotheHFA3925RFPowermarketplacewithaflurryofproductsofvarioustypesandAmplifier.Theswi
5、tchinreceivemodeleadstotheHFA3424designs.WirelessoffersadifferentparadigmforcomputerLowNoiseAmplifier,whichisusedtosetthenoisefigurenetworkusersandcapabilitiesbreakingthetethersofthefortheentirereceiver.wiredonlynetwork.ThispaperwillexploretheprocessofdevelopingthearchitectureofonesuchWLANsystem.N
6、ext,thesignalenterstheHFA3624RF/IFConverter,firstpassingthroughtheintegratedLNAsectionandthengoingWhatshouldaWLANradiodo?Whataretheneedsoftheoff-chiptoFL2.FilterFL2isaninexpensive2polemonolithicmarketplace?WhatperformanceispossibleintheLCbandpassfilterusedtosuppressimagenoise.technology?Whereshouldt
7、hecompromisebetweencostandperformancebemade?ThesearethetypesofquestionsoneThesignalthenentersthedownconvertersectionofthehastoanswerwhensettinggoalsforanewradioarchitecture.HFA3624.Low-sidelocaloscillatorinjectio
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