基于决策树的调制模式识别及gnu radio模块实现-modulation pattern recognition based on decision tree and implementation of gnu radio module.docx

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2018-06-05 发布于上海
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基于决策树的调制模式识别及gnu radio模块实现-modulation pattern recognition based on decision tree and implementation of gnu radio module.docx

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基于决策树的调制模式识别及gnu radio模块实现-modulation pattern recognition based on decision tree and implementation of gnu radio module

AbstractBasicideaofSDRisfulfillalltheradiofeaturesbyloadingcorrespondingsoftwareprogrambasedonageneral,standardizedandmodularizedhardwareplatform.It‘spossibletobreakallthedependenceonhardware-baseddesignmethodanddesignmethodwhichisfacedtousage.Thecharacteristicsofmodulatedsignalaremulti-band,multi-institutionalandmulti-functional.Soit‘snecessarytorecognizetheparametersofmodulatedsignalbeforeitsdemodulating.Thisrecognitionprocedureismoreimportantinnon-cooperativecommunicationmodeorcomplicatedelectronicwar.Theautomaticmodulationrecognitionhasbecomeanimportantresearchtopic.Inthisthesisthemodulationrecognitionhastwosteps.Thefirstoneisprocessing,inwhichinputsamplesignalaretransformedtospecialpatterns.Thesespecialpatternscontainandrepresentthesignalmodulationfeatures.Thesecondisclassification,inwhichthetransformedsignalpatternsareclassifiedandrecognizedbycertainalgorithm.Modulationmethodsareusuallydividedintotwomajorcategoriespulsemodulationandsinewavemodulation.Pulsemodulationusesapulsesequenceoragroupofdigitalsignalasthecarrierwave,andsinewavemodulationusehigh-frequencysinwave.Thisthesisfocusesonthesinwavemodulation,andtheDecisionTreeclassificationalgorithm.DecisionTreehashighefficiencyandlowcomputationalcomplexity,andcanbeappliedinembeddedsystem,PDAforexample.Thisthesiswillintroduceamethod,whichcanrecognizethe95%probabilityofAM、FMandQPSKsignalatS/N8dB.GNURadioisafreesoftwaredevelopmenttoolkitthatprovidesthesignalprocessingruntimeandprocessingblockstoimplementsoftwareradiosusingreadily-available,low-costexternalRFhardwareandcommodityprocessors.It‘sawidelyusedsoftwareradiohardwareplatform,whichimprovetheflexibilityandexpansibilityofthewholesystem.ThisthesisuseGRCplatformanditsgraphicalinterfacetoillustratethemodulationidentifyingprocessandgettherecognitionresult.ThisisthefoundationofthefutureresearchonGNURadio.Keywords:GNURadio,modulationrecognition,decisiontree,SDR目录摘要.......................................................................................................