基于WiFi的室内定位系统

摘要近年来,随着无线移动通信技术的快速发展,手机网络结合快速定位的方法在应急救援和各种基于位置的服务中已逐渐被应用。但由于卫星信号很容易受到各种障碍物阻碍,所以卫星定位技术不太适合室内或高层建筑中使用，当前无线室内定位技术的快速发展,已经成为定位系统一个强大的补充技术。本文设计及实现了一个基于无线传感器网络的室内定位系统，客户端为配备WIFI模块的Android手机，方便借助安卓手机的定位系统方便地查询自身位置，并获取各种基于位置的服务，在一定程度上克服了RSSI信号随机抖动对定位的影响，提高了定位的稳定性和精度。【关键词】：WIFI、室内定位、AndroidAbstracttraditionalpositioningmethods,suchastheGPScivilianBeidouandhasbeenrealizedinoutdoormeterscanachievedecimeterlevelpositioning,positioningthemilitary.However,whethercivilianormilitary,cannotbeacceptedintheindoorpositioningsignal.Inrecentyears,withthepopularityofWIFIdevicesandWIFIsignalcoveragecontinuestoimprove,wearealsobeginningtoWIFIPositioningTechnologyin-depthstudy.Becausetherearemanyvendorsinvolvedinthisfield,soWIFIPositioningAlgorithmisendless.Now,WIFIPositioningTechnologyhasbeguntograduallyoutofthelaboratory,tothemarket.Atthesametime,allkindsofappbasedontheWIFIseemstobeoverwhelmingovernight,IpersonallythinkthatWIFIbasedserviceswillshowablowoutinthenext2-3years.Mymainworkisasfollows:1basedontheresearchofsignalpropagationmodel,aWIFIBasedAdaptiveindoorlocalizationalgorithmbasedonRSSIisproposed.Theexperimentalresultsshowthattheimprovedalgorithmhasbetterlocalizationaccuracyandbetterenvironmentaladaptability.Thatis,accordingtotheintensityofWIFIsignalpositioning.2Researchontheexistingfingerprintbasedlocalizationalgorithm.Thelocalizationprocessisdividedintofourstages,respectivelydiscussthelocationoftheprimitivestageofpretreatmentmethod,solvingthenearestneighbormetric,kneighborselectionandlocationmethodtodeterminetheimpactontheindoorpositioningaccuracy,todeterminetheoptimallocationalgorithmsuitableforthecurrentindoorenvironment.3designtheindoorpositioningprototypesystembasedonwirelesssensornetwork.Itisprovedthattheimprovedlocalizationalgorithmbasedonthesensorandtheoptimizedfingerprintbasedlocalizationalgorithmhavehigherpositioningaccuracy.Thispaperwilldemonstratetheindoorwirelesspositioningonthemarketseveralcommonalgorithms,somelargeconveniencestationsandairports,parkinglot,shoppingmallsandotherunits,selecttheappropriateindoorpositioningsystem,providingexcellentservicefortheuser.Saveusertime.【Keywords】:WIFI,indoorpositioning,Android,wirelesssensor目录摘要..................................................................................................................................................1Abstract.............................................................................................................................................1目录..................................................................................................................................................31.引言...............................................................................................................................................41.1研究背景.............................................................................................................................41.2国内外研究现状.................................................................................................................71.3本文研究的目的和意义.....................................................................................................91.4论文的组织架构..............................................................................................................102室内定位的综述.........................................................................................................................102.1无线室内定位技术的概述...............................................................................................112.2室内GPS定位技术..........................................................................................................112.3室内的无线定位技术简介...............................................................................................132.4室内无线定位方法的介绍...............................................................................................152.4.1与距离无关的定位方法........................................................................................152.4.2与距离相关的定位方法........................................................................................163.需求分析......................................................................................................................................193.1功能需求...........................................................................................................................193.2服务流程...........................................................................................................................204.WIFI定位系统的设计.................................................................................................................224.1定位算法模块...................................................................................................................224.2通信模块...........................................................................................................................235.系统实现......................................................................................................................................255.1系统首页.......