通信對(duì)抗中高效干擾方法研究.pdf

1、西安電子科技大學(xué)碩士學(xué)位論文通信對(duì)抗中高效干擾方法研究姓名：常琳英申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：田紅心201112AbstractCommunicationjamming，asanimportantpartofcommunicationcountermeasures，isanimportantmeanstowininitiativeonthebattlefieldTherefore，iIlnlodemwarfare，s

2、uccessfulinterferenceisaneffectivewayagainsttheenemybydegradingorevendestructingthereliabilityoftheircommunicationlinkWiththecontinuousimprovementofthemilitarytheory，andrapiddevelopmentsofjammingtechnology，therequirement

3、sofcommunicationjammingperformanceareincreasinglydemandingThisthesisstudyontheinterferencepattemsanddesigntheinterferencestrategytointerferetheDSSS(directspreadspectrumsystem)Themaincontentsofthisthesisaresholwnasfollows

4、：IBasingontheoreticalanalysisandsimulationoftheinterferencepatternweproposeanewinterferencestrategyitdiscontinuousinterferencestrategySimulationsalecarriedoutwithrespecttothenoiseamplitudemodulationjamming，linearfrequenc

5、ymodulationjammingandGaussianwhitenoisejammingemployingtheproposedinterferencestrategytojamaspreadspectnmasystemThesimulationresultsshowthattheinterferencestrategycouldprovidebetterjammingperformancecompared、析ththeconven

6、tionalonesMoreovertheimpactsofbandwidthandcenterfrequencyofmenoiseontheiammingperformancearestudiedandtheoptimalparametersforintermittentinterferenceareobtained；2Theperformanceofthediscontjammingstrategytojamacommunicati

7、onsystemwithAGC(automaticgaincontr01)inthereceiverareexploredwithBPSKandBPSKbasedspreadspectrumsystemasagoodsysteminsimulations，respectivelyNumericalresultsshowthattheappropriatechoiceofparametersforthediscontinuousinter

8、ferencestrategycouldreducethejamming—signalratioatwhichthejammingappearstobeeffectionAsfortheBPSKbasedspreadspectrumsystem，theproposedinterferencestrategycouldalsoimprovethejammingperformance；3Theperformanceoftheadaptive

9、notchfilterwiththechangeofthecarrierfrequencyofthejammingisinvestigatedComputersimulationsshowthattheconvergingspeedoftheadaptivenotchfilterrelynotonlyontheradiusofconvergence，butalsoonthepowerofthejammingWhenthefrequenc