基于Wigner-Ville分布与PCA降维的射频指纹特征提取仿真.doc

本科毕业设计（2015届）题目基于Wigner-Ville分布与PCA降维的射频指纹特征提取仿真学院通信工程学院专业信息对抗技术班级10083511学号10083122学生姓名指导教师完成日期2015年6月杭州电子科技大学本科毕业设计摘要指纹的概念源于人类指纹特征，凭借指纹特征可以对人进行个体识别。推而广之，无线网络发射机指纹识别概念的提出源于发射机个体身份的识别要求。无线网络发射机识别，又称为无线网络发射机信号指纹识别，是指从接收到的无线网络信号中提取能够标识发射机个体的特征向量集(类似人类的指纹特征)，从而识别发射机个体的技术。随着当今复杂电磁环境下的信息安全问题随时涌现，该技术在通信对抗侦察系统、无线网络安全、通信资源管理等诸多领域有着十分广阔的应用前景。然而如今的现代无线网络发射机设备集成度和一致性极高、调制参数设置软件化、载波频率高信号带宽大等特点给无线发射机的个体识别技术带来了更大的挑战和更加深入研究的需要。本文研究了基于Wigner-Ville分布的时频分析法将一维时域信号映射到由时间和频率组成的时-频联合矩阵上来分析信号，再利用PCA降维技术降低时频数据矩阵的维数，保存主要信息，从而提取到信号特征，有效的识别同一型号的不同发射机个体。关键词：指纹；无线网络发射机指纹识别；Wigner-Ville分布；PCA降维AbstractTheconceptoffingeroriginatedinthehumanfingerprint,itcanidentifyindividualsbyvirtueoffingerprint.Byextension,theproposesoftheconceptofwirelessnetworktransmitterfingerprintfromthetransmitteridentificationrequests.Wirelesstransmitteridentificationalsoknownaswirelesstransmittersignalfingerprinting.It’satechnologytogettingtheextractionoffeaturesvectorsetswhichcanidentifyindividualtransmitterthatissimilartohumanfingerprintscharacteristics,fromthereceivedsignalinawirelessnetwork,toidentifyindividualtransmittersintheend.Withtoday'scomplexelectromagneticenvironmentinformationsecurityproblemsemergeatanytime,thetechnologyinthecommunicationagainstreconnaissancesystems,wirelessnetworksecurity,communicationsresourcemanagementandmanyotherfieldshasaverybroadapplicationprospects.today'smodernhighwirelessnetworktransmitterdeviceintegrationandconsistencyofthemodulationparametersettingsoftware,thecarrierfrequencyandothercharacteristicsofhighsignalbandwidthbringsgreaterchallengesandneedsmorein-depthstudytothewirelesstransmitterindividualidentificationtechnology.Thispaperstudiesthetime-frequencyanalysismethodbasedontheWigner-Villedistribution,wemaptheone-dimensionaltime-domainsignaltothecompositionofthetimeandfrequencyjointmatrixtoanalyzethesignal,andthenusePCAdimensionalityreductiontechnologytoreducethetime-frequencydimensionofdatamatrix,savekeyinformation,therebyextractingasignalfeature.Keywords:Fingerprint;fingerpri