固定中继蜂窝网络中移动定位策略的研究

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1、上海交通大学硕士学位论文固定中继蜂窝网络中移动定位策略的研究姓名：欧文涛申请学位级别：硕士专业：通信与信息系统指导教师：戎蒙恬20070501上海交通大学硕士学位论文保证定位的精度。为了降低非视距传播的影响并进一步提高定位的整体性能，笔者利用固定中继蜂窝网络特有的数据收集的便利性和高效性，提出了GPS辅助的先验信息收集策略，通过具有GPS定位功能的用户高效地为网络提供先验信息数据。最后，在这种策略下，基于已有的先验信息数据库，引入统计理论和模式识别等数学方法，实现移动终端的位置估计。仿真结果证实了所提

2、出策略的有效性并对各种统计算法的性能作了全面地比较。关键词：固定中继，蜂窝网络，移动定位，信号衰落差值，先验信息II上海交通大学硕士学位论文ResearchofMobilePositioningStrategiesinFixedRelayingCellularNetworkABSTRACTMobilelocationservicesbecomemoreandmorepopularwiththehugemarketpotential,whilethemulti-hopnetworkarchitectur

3、eisalsoattractiveandgoingtobethetrendofmobilecommunications.Thispaperinvestigatesthemobilepositioningtechnologiesandstrategiesinthenewnetworkarchitecture----thefixedrelayingcellularnetwork,andmanagestoraisethepositioningperformanceandincreasetheaccuracy

4、.Thepositioningschemesbasedonthesignalstrengtharenotpaidenoughattentionduetotheinstabilityagainstthesurroundingenvironments.Butitstillhasincomparableadvantagesoflowcost,universalityandeasyrealization.Apositioningschemebasedonthedifferencesofsignalfading

5、infixedrelayingcellularnetworkisproposed.Themethod,thatcanreducetheimpactofshadoweffects,isadaptivetodifferentpathlossmodelsanddoesnotrequireanyhardwaremodificationonnetworkormobiledevices.Moreover,withthecooperativemeasurementsprovidedbyfixedrelays,bet

6、teraccuracycanbeachievedwithlesssignalingcost.SimulationresultsshowthatthepositioningaccuracyoftheproposedschemeisbetterIII上海交通大学硕士学位论文thantraditionalschemes.Inthenon-line-of-sighttransmissionenvironments,theaccuracycannotbeguaranteedonlybyreal-timemeas

7、urement.Toavoidtheinfluenceofnon-line-of-sighttransmissionandfurtherimprovetheoverallperformance,aGPS-assistedstrategyforcollectingaprioriinformationisalsoproposed.Inthisstrategy,themobileterminalsthatenhancedwithGPSmodulesareabletoofferaprioriinformati

8、ontothemobilenetworkefficientlyowntothecooperativemeasurementsfromthefixedrelaysinthecell.Finally,underthestrategy,somemathematicalmethodssuchasstatisticaltheoryandpatternrecognitionareintroducedformobilelocationestimationbasedon