蜂窝网络抑制非视距误差定位算法研究

《蜂窝网络抑制非视距误差定位算法研究》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、国内图书分类号：TN911．7西南交通大学四南父遗大罕研究生学位论文年级三QQ四级姓名鄞盍堕申请学位级别王堂亟±专业值呈皇信皇矬理指导教师翌壬教攮二oo七年三月西南交通大学硕士研究生学位论文第lI页AbstractSinceFCCsubmittedE-911locationregulation,corporationsallaroundtheworldhaveestablishedtheirlocationsystemschemabasedonGSM、IS一95and3Gduetothecompellentdemandscontrolledbythegove

2、rnmentandthepromptingdrivedbythemarketitself．Tillnow,ithasmadesomegreatprogress．butstillbewithsumcdifferencesbetweenE-91ldemandsandthepracticeinprecision．Becauseoftheexistenceofthenov_idealchannelconditionand110．1iIle-of-sighttransmissionbetweentheMSandBasoStation(BS)ingeneralinthe

3、cellularlocation,NLOSe玎．0rmitigationhasbecomeakeytechnologyandhotspotintheresearchaboutWirelessLocaliOn．Theno-line-of-sightelTOrmitigationisstudiedinthepaper．Firstly,higher-orderstatisticsandseeond-ordcrstatisticsestimatingmethodsareexpoundedandanalyzedinordertooffermathematicalthe

4、orytothefollowing．Secondly,basedondeepanalysisandnumerousdiscussionofeleelriewaveofNLOStransmittedcharacteristicandtransmittedmodel,somerepresentativeNLOSerrormitigationalgorithmsarecompared．Afteranalyzedmanybasedrangescalerestrainedalgorithm,aneffectivemethodisproposed--NLOSstatis

5、ticalpropertyandrangescalerestrainedalgorithmareimegrated．WefirstlycorrectTDOAbyNLOSstatisticalproperty,thenUSerocuiTcnceequationtoc讲TectCOemeicntinordertomitigateNLOSglTOrandtotransformNLOStransmittedsignalintoLOSsignalorneartOLOSsignal．Lastlymobilelocationisestimatedbyleastsquare

6、method．ThismethodnotonlyavoidsNLOSstatisticalmodel’slocalization,butalsolessensthenumberofrepetitionofrangescalerestrainedalgorithm．Simulationandcomparisonofperformancewithotherexistingmethodshaveshownitseffectivenessofno-line-of-sighterrormitigationinlocationestimateandimproveloca

7、tionaccuracy．Nowadays，somemethodshavebeenproposedinsomepaperstoeliminateormitigationtheeffectoftheno-line-of-sighte玎仉Buttheireffectivenessofno．1ine-of-sighterrormitigationintimeofarrivalortimediffercnccofarrivalisnotveryvalid．Therefore，no-linc-．Iof-sighterrorshavebecomethecrucialfa

8、ctorontheenhancementofloca