WIMAX射频系统关键技术研究与设计

《WIMAX射频系统关键技术研究与设计》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、西南交通大学硕士学位论文WiMAX射频系统关键技术研究与设计姓名：范涛申请学位级别：硕士专业：通信与信息系统指导教师：方旭明20070401Inrecenttenyears，telecommunicationhaveAbstractmoreandmorebeenfound，kindsofwaysforandtheworld’Stelecommunicationmarketisdevelopingrapidly．It’§developingspeedmayevenbefasterthanbeforebecauseofthedevelopmentofhardwa

2、reandsoftwareofwirelesscommunicationandtheusers’increasingdemands。Therefore，themanufacturingabilityofthetelecommunica—tionfacilityandtheabilityofbuildingthenetworkbecomeanimportantstandardtodeterminenationalrealstrength．Currently,real．timemultimediawideband’SwirelessaccessisthefoCU

3、StechnologywhichneedsthesuppoftoftheWiMAXthehighspeedtechnology．TheWiMAXtechnologymakesi．nteractivecommunicationbetweentheusersandtheInternetcometruewithitsbitrateat70Mb／s。Peoplecanexchangetheirinformationbythiswirelesstechnologywithin50kms，andtheycanalsoexperienceatransmissionspee

4、dhigherthanDSLorCableModemwithinabout6kms．Inthiscomplexsystem，oneofthemostkeytechnologiesistheRF．However,RFisdesignedalmostbytheexperienceofengineerandcircuitdebuggingbecausetherearenoexactmodelsindesignSOftwarefordifferentdeviceswhicharenon—linear,time·variety,instabilityandforthe

5、circuitwithparasiticnoise．TheauthorofthisthesisworkedwiththeS蹦hasfinishedanFDDRFsystemwhichWOrksonthe700MHzcentrefrequencyaccordingtotheIEEE802。16d．Thissystemconsistsofuplinktransceiver，localdownlinkoscillators．poweramplifier,LNA，controlcircuitandantenna。ThetransceiverUSeSsuperhete

6、rodynestructure．TestdataindicatethatthesystemperformancehasachievedthestandardIEEE802。16d．ThisthesisinformswhatWehavedoneasfollows．Firstly,transceiver’Sstructurehasbeenselected，thentherequirementsoftheIEEE802．16d西南交通大学硕士研究生学位论文第1ll页havebeenanalyzed，andthetargetvaluehasbeencalculate

7、dandallocated．Secondly，thetransceiver。localoscillatorandcontr01circuitshavebeendesigned．Thirdly，thenoisesuppressionhasbeenstudiedandthepoweramplifier’simpedancehasbeenmatched．Fourthly，theAGChasbeendesignedandthecircuit’slayoutandplacementofthedeviceshavebeenthoughtoveLFifthly，thelo

8、opfilterhasbeendesignedand