final report - reu in cognitive communications最终报告- reu认知通信

《final report - reu in cognitive communications最终报告- reu认知通信》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、SamplingMixerforSoftwareDefinedRadioApplicationsusing0.18µmRFCMOSTechnologybyMattDavisandChrisDavisAFinalReportSubmittedtothePrincipalInvestigatorofNSFResearchExperiencesforUndergraduates:CognitiveCommunicationsVirginiaPolytechnicInstituteandStateUniversityBradley

2、DepartmentofElectricalandComputerEngineeringPrincipalInvestigator:Dr.CarlDietrichProjectMentors:Dr.Kwang-JinKohandHediehElyasiJuly2013iiiTableofContentsAbstract11.Introduction22.BasicsofMixer43.CircuitDesign84.SimulationResults105.Conclusion135.References14iiiTabl

3、eofFiguresFigure1:IdealSDRArchitecture2Figure2:PrimaryFunctionalUnitsofReceiver:HighLevelDiagram3Figure3:TheoreticalOutputFrequencySpectrumofMixer4Figure4:GraphicalRepresentationof1dBCompressionPoint5Figure5:IIP3FrequencySpectrumGraphicalTheory6Figure6:IIP3and1dBC

4、ompressionPointRelationship7Figure7:DSMSimplifiedCircuitDiagram8Figure8:FrequencySpectrum:RFInputPower9Figure9:FrequencySpectrum:IFOutputPower9Figure10:Simulation1dBCompressionPoint10Figure11:CalculatedIIP3fromSimulation10Figure12:IIP3GraphicalSimulationResult11ii

5、iTableofTablesTable1:SummaryofDSMSimulationResults12iiiAbstractAmajoraspectofcognitiveradio(CR)includestheabilitytodynamicallyadjusttransmissionfrequencyduetovariouschangesinadevicesoperatingenvironment.ThebasisofCRisbuiltuponsoftware-definedradio(SDR)technology.S

6、amplingmixersprovidefrequencytranslationthataidintheanalog-to-digitalconversionprocessforSDR,aswellasmoveanalog-to-digitalconverters(ADC)closertotheantennainput;amajorgoaltoachieveenhancedperformancewhilemaintaininglowpowerconsumptionandlowcostinsoftwaredefinedrad

7、ios.Inthisproject,asimpledirectsamplingmixerhasbeendesigned,simulated,andanalyzedusing0.18umRFCMOStechnologytomeetfrequency-adaptivecarrier demodulationdemands.Proposedsamplingmixersimulationresultsincludenoisefigure(NF)of15dB,conversiongainof20.5dB,1dBcompression

8、point-16.67dBm,third-orderinterceptpoint(IIP3)of-5.81dBmandpowerconsumptionof3.66mW.131.IntroductionSoftware-definedradio(SDR)servesasthecurrentoptimals