无线电通信平台的实现算法的外文文献.doc

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1、AnalysisandImplementationofaNovelSingleChannelDirectionFindingAlgorithmonaSoftwareDefinedRadioPlatformJohnJosephKeavenyCapter1Aradiodirectionfinding(DF>systemisanantennaarrayandareceiverarrangedinacombinationtodeterminetheazimuthangleofadistantemitter.Basically,all

2、DFsystemsderivetheemitterlocationfromaninitialdeterminationoftheangle-of-arrival(AOA>.b5E2RGbCAPRadiodirectionfindingtechniqueshaveclassicallybeenbasedonmultiple-antennasystemsemployingmultiplereceivers.ClassictechniquessuchasMUSIC[1][2]andESPRITusesimultaneousphas

3、einformationfromeachantennatoestimatetheangle-of-arrivalofthesignalofinterest.Inmanyscenarios(e.g.,hand-heldsystems>,however,multiplereceiversareimpractical.Thus,singlechanneltechniquesareofinterest,particularlyinmobilescenarios.Althoughtheamountofexistingresearchf

4、orsinglechannelDFisconsiderablylessthanformulti-channeldirectionfinding,singlechanneldirectionfindingtechniqueshavebeenpreviouslyinvestigated.p1EanqFDPwWhenconsideringsinglechanneldirectionfindingsystems,wefindthattherearetwodistincttypesofDFsystems.ThefirsttypeofD

5、Fsystemistheamplitude-basedDFsystem.Amplitude-basedsystemsdeterminethebearingofthesignal(ortheAOA>byanalyzingtheamplitudesoftheoutputvoltagesfromeachantennaelement.AmplitudeDFsystemsincludetheWatson-WatttechniqueusinganAdcockantennaarray.DXDiTa9E3dThesecondtypeofDF

6、systemisthephase-basedDFsystem.Phase-basedsystemsusethreeormoreantennaelementsthatareconfiguredinawaysothattherelativephasesoftheiroutputvoltagesareuniqueforeverywavefrontangle-of-arrival.Phase-basedDFsystemsincludethePseudo-Dopplertechniquewithacommutativeswitchba

7、sedantennaarray.RTCrpUDGiTSincebothoftheabovetechniquesareprimarilyanalogtechniquesandhavebeenanalyzedinpreviouswork,wewillinvestigateanewsinglechanneldirectionfindingtechniquethattakesspecificadvantageofdigitalcapabilities.Specifically,weproposeaphase-basedmethodt

8、hatusesabankofPhase-LockedLoops(PLLs>in21/21combinationwithaneight-elementcirculararray.OurmethodissimilartothePseudo-Dopplermethodinthatitsample