基于WiFi的室内定位系统.docx

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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、Android

Abstract
traditionalpositioningmethods,suchasthe"GPS"civilian"Beidou"andhasbeenrealizedinoutdoormeterscanachievedecimeterlevelpositioning,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.
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