资源描述:
《A Cooperative Positioning Algorithm in Cellular Networks with Hearability Problem》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、66IEEEWIRELESSCOMMUNICATIONSLETTERS,VOL.2,NO.1,FEBRUARY2013ACooperativePositioningAlgorithminCellularNetworkswithHearabilityProblemZimingHe,StudentMember,IEEE,AbdullahAlonazi,YiMa,SeniorMember,IEEE,andRahimTafazolli,SeniorMember,IEEEAbstract—Theletterpresentsacooperativepositioningalgo-
2、distanceestimatesbetweentheun-locatedMTandseveralrithmincellularnetworks.Duetohearabilityproblem,thelocatedMTs.Theapproachesdonotsufferfromhearabilitydistancebetweenamobileterminal(MT)andonlyitshomeproblem.However,GPSmayfailduetosignalblockagebasestationcanbeutilizedforpositioning.Moreo
3、ver,severalinsomeharshscenarios,suchasurbancanyon.Moreover,MTsbelongsto3adjacentcellscooperatewiththeirnearbyMTsforpositioning.ThesimulationresultsshowthattheproposedinaccuratepositioninformationofthelocatedMTsdegradesalgorithmoutperformstheexistingalgorithmsintheliterature.thepositioni
4、ngaccuracyoftheun-locatedMT.ThehearabilityproblemmotivatesustoconsiderascenarioIndexTerms—Cellularnetworks,hearability,cooperativepo-sitioning,receivedsignalstrength(RSS).asillustratedinFig.1,whereanMTcanonlyestimatethedistancestoitshomeBSandnearbyMTs.ThedistancescanbeestimatedbytheRSSr
5、anging,e.g.,[8].AllthedistanceI.INTRODUCTIONestimatesareforwardedtoadatafusioncenterforcentralizedOOPERATIVEpositioninginwirelessnetworkshaspositionestimation.Intheconsideredscenarios,thechallengeCreceivedincreasingintereststhankstoitsabilityofofthepositionestimationisthatthedistancesbe
6、tweenanimprovingpositioningaccuracy[1]-[6].OneofpromisingMTanditsneighboringBSsarenoteasytoobtained.Ex-approachesisreferredtoastherange-basedcooperativeistingpositioningalgorithmsintheliteratureusetheshortestpositioning,whichrequiresatleast3anchors[5].Firstly,pathalgorithmstofindthedista
7、ncesbetweentheMTanddistancebetweentwowirelessnodesisestimatedthroughitsneighboringBSs.Forexample,twowell-knownshortestemploymentofreceivedsignalstrength(RSS)ortime-of-pathalgorithmsaredistancevector(DV)algorithm[15]andarrivalbasedrangingtechniques[7].Then,mobileterminalDijkstra