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ID:36796102
大小:1.84 MB
页数:61页
时间:2019-05-15
《智能天线中DOA估计算法研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要智能天线技术是第三代移动通信系统的关键技术之一。它引入空分多址的概念,通过用户空间位置的差异对其进行分离。因此各用户的DOA2、)时,使用前后向空域平滑技术的MUSIc算法基本失效。本文提出的算法最多可检测M.2个含有多径的信源DOA。计算机仿真表明,该方法优于普通MUSIC算法。同时该法构造的信号子空间在传统EsPRIT算法也可适用。由于无线通信中多径不可避免,新方法提高了多径信号估计性能,所以在实际应用中具有重要意义。3.平面阵中的团阵具有很多优良的特性,是真正实用的阵列。所以对圆阵的DOA算法作一重点研究是很有必要的。本文研究了用均匀圆环天线阵(UCA)来估计多个入射平面波空间2维角(俯仰角,方位角)的算法问题。最后提出一种减少计算量的UcA—RB.MusIc算法,计算机模拟结果证实该方法的有效性。关键3、词:智能天线DOAMUSIC算法ESPRIT算法相位模式激励ABSTRACTSmartantennatechnologyiSoneofkeytechnologiesofmobilecommunicationsystemofthethirdgeneration.Itintroducestheconceptofspatialdivisionmultipleaccess,whichusescustomerspatialpositiondifie:rencetodivide.So.DOAfromeachcustomerplaysaveryimportantroleinsmartantenna4、asanimportantparameterofthecustomerspatialposition.Inthethesis,DOAestimationalgorithmforsmartantennainwirelesscommunicationsiSconsidered.Themaincontributions.ofthethesisareasfollows:1.BasicDOAprincipleandalgorithmsaremastered.Fortypicalalgorithms,detailedcomputersimulationiSdone.Theresultsarean5、alyzedandcompared.2.Onthebasisoftraditionalsub-spatialalgorithm.aMUSICalgorithmforimprovingmulti·pathDOAestimationperformanceisproposed.Whenthesumofmulti·pathsignaIcomponentsismolethan2M/3(Misnumberofarrayelements),MUSICalgorithmwithforwardandbackwardspatialsmoothingtechnologyiSalmostinvalid.Co6、mputersimulationshowsthatthismethodiSsuperiortocommonMUSICalgorithm.Also,也esignalsub—spacebuiltby血ismethodiSalSOsuitablefortraditionalESPILITalgorithm.Becauseinwirelesscommunication.multi-pathiSunavoidable,andnewmethodimprovesmulti-pathsignalestimationperformance.SOitiSofveryimportanceinactualp7、ractice.3.Circulararrayofplanararrayhasmanyexcellentfeatures.whichiSareallypracticalaltovSo.itiSnecessarytoregardDOAalgorithmofcirculararrayasanimportantresearch.Intllethesis.estimationoffiaultipleincidenceplanarwavespatial2-Dangl
2、)时,使用前后向空域平滑技术的MUSIc算法基本失效。本文提出的算法最多可检测M.2个含有多径的信源DOA。计算机仿真表明,该方法优于普通MUSIC算法。同时该法构造的信号子空间在传统EsPRIT算法也可适用。由于无线通信中多径不可避免,新方法提高了多径信号估计性能,所以在实际应用中具有重要意义。3.平面阵中的团阵具有很多优良的特性,是真正实用的阵列。所以对圆阵的DOA算法作一重点研究是很有必要的。本文研究了用均匀圆环天线阵(UCA)来估计多个入射平面波空间2维角(俯仰角,方位角)的算法问题。最后提出一种减少计算量的UcA—RB.MusIc算法,计算机模拟结果证实该方法的有效性。关键
3、词:智能天线DOAMUSIC算法ESPRIT算法相位模式激励ABSTRACTSmartantennatechnologyiSoneofkeytechnologiesofmobilecommunicationsystemofthethirdgeneration.Itintroducestheconceptofspatialdivisionmultipleaccess,whichusescustomerspatialpositiondifie:rencetodivide.So.DOAfromeachcustomerplaysaveryimportantroleinsmartantenna
4、asanimportantparameterofthecustomerspatialposition.Inthethesis,DOAestimationalgorithmforsmartantennainwirelesscommunicationsiSconsidered.Themaincontributions.ofthethesisareasfollows:1.BasicDOAprincipleandalgorithmsaremastered.Fortypicalalgorithms,detailedcomputersimulationiSdone.Theresultsarean
5、alyzedandcompared.2.Onthebasisoftraditionalsub-spatialalgorithm.aMUSICalgorithmforimprovingmulti·pathDOAestimationperformanceisproposed.Whenthesumofmulti·pathsignaIcomponentsismolethan2M/3(Misnumberofarrayelements),MUSICalgorithmwithforwardandbackwardspatialsmoothingtechnologyiSalmostinvalid.Co
6、mputersimulationshowsthatthismethodiSsuperiortocommonMUSICalgorithm.Also,也esignalsub—spacebuiltby血ismethodiSalSOsuitablefortraditionalESPILITalgorithm.Becauseinwirelesscommunication.multi-pathiSunavoidable,andnewmethodimprovesmulti-pathsignalestimationperformance.SOitiSofveryimportanceinactualp
7、ractice.3.Circulararrayofplanararrayhasmanyexcellentfeatures.whichiSareallypracticalaltovSo.itiSnecessarytoregardDOAalgorithmofcirculararrayasanimportantresearch.Intllethesis.estimationoffiaultipleincidenceplanarwavespatial2-Dangl
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