sdr数字接收机载波同步系统的研究及fpga实现的论文

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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