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ID:34633925
大小:8.48 MB
页数:87页
时间:2019-03-08
《sdr数字接收机载波同步系统的研究及fpga实现的论文》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、黑龙江大学硕士学位论文AbstractInrecentyears,sothvaredefinedradio(SDR)hasbeenwidelyrecognizedforitsmodular,flexibility,scalability,andmanyotheradvantagesinthefieldofwirelesscommunications.ThecoreoftheSDRisthatrealizesthedifferentfunctionbyloadingdifferentsoftwaremoduleinthegeneral
2、hardwareplatform.ThecarriersynchronizationwhichisthepremiseofthecommunicationsystemtoreceiveinformationreliablyisoneofthekeytechnologiesintheSDRreceiver.Theperformanceofthecarriersynchronizationwilldirectlyaffectthequalityofcommunication.FPGAtechnologywhichhasaverystro
3、ngprogrammableabilityprovidesagoodplatformforSDRreceivertorealizeavarietyofalgorithm.ThisarticlehaspreciselyusedtheFPGAdevelopmentplatformtostudythecarriersynchronizationsystemoftheSDRreceiver.Thethesisfirstlydescribesthebasictheoriesofsoftwaredefinedradioinordertoprov
4、idethetheoreticalbasisforthedesignofthisarticle.Thenseveralkindofcommoncarriersynchronizationalgorithmhasbeenresearched.Throughanalyzingandcomparing,thecarriersynchronizationalgorithmhasbeendeterminedofthissystem:Costascarriersynchronization.Onthisbasis,theoveralldesig
5、nofthesystemhasbeendetermined.Andthemainmodulesofthecarriersynchronizationsystemhavebeendesigned.Furthmore,thedesignofthehardwareplatformhasbeencompleted.Afterwards,thecarriersynchronizationloophasbeenmodeledandsimulatedon’theMATLABplatform.Thesimulationresultshaveprov
6、edthecorrectnessofthestructureandthealgorithmabouttheloop.Thenaccordingtothedesignofthehardwareplatform,thePCBelectriccircuitboardhasbeenmanufactured.Onthedesignedhardwareplatform,VerilogHDLcodehasbeenwrittenusingQuartustIdevelopmentsoftwaretorealizetheFPGAimplementati
7、onofSDRtransmitterandreceiver.AndtheSignaltapIIonlinelogicanalyzerhasbeenusedtofinishthehardwaresimulationandthetestforthe.1I.Abstractsystem.Inthedesign,integralandaccumulatorshavebeenusedtoachievethelow-passfilteringinsteadofthetraditionallow-passfilter.伯ehigheraccura
8、cyofthearctangentalgorithmhasbeenusedtOdetectphaseerrortoreplacethetraditionalmultiplicationalgorithm.Thehigheraccura
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