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ID:36513186
大小:1.36 MB
页数:47页
时间:2019-05-11
《无线传感器网络分布式节点定位算法研究》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、西北工业大学硕士学位论文无线传感器网络分布式节点定位算法研究姓名:王建刚申请学位级别:硕士专业:计算机应用技术指导教师:王福豹20060301AbstractWSN(WirelessSensorNetwork),whichismadebytheconvergenceofsensoLembeddedcomputation,networksandwitlesscommunicationtechnologies,isanoveltechnologyaboutacquiringandprocessinginformation.WSNhavetheabilitytocollaborati
2、velymonitoring,sensing,collectingandprocessinginformationofthephysicalworldthroughad—hocdeploymentofnumeroustiny,intelligent,wirelesslynetworkedsensornodes。Pomntialapplicationsofsuchsensornetworksspanmanydomains:militarysurveillance;environmentalmonitoring(air,water,soil,chemistry);smartspac
3、es;physiologicalmonitoring;precisionagriculture;transportation;factoryinstrumentation.NodelocalizationprovidedthefoundationformanyapplicationofWSN.Inthispaper,wefirstdiscussedseveralhavebeenproposeddistributedlocalizationalgorithmsandquantitativelyanalyzedtheperformance.Secondly,anewdistribu
4、tedlocalizationalgorithmsbeingproposed.Ourapproachimprovedthelocalizationperformancefromtwoaspect:first,torestrainerroraccumulationduringiteratedlocalizationprocess,weapplyingWLSE(WeightedLeastSquareEstimates)tonodelocalizationalgorithmandchooseproperweightcoefficienttoreducelocationerror;se
5、cond,toimprovelocalizationcoveragerate,weestablishedacoordinatecomputemodelbasedontwoanchorandaconnectionconstrmnconditionandintegrateditwitlltrilateration/multilaterationandEuclideanalgorithm.Afterthat,weimplementedDV-hoplocalizationalgorithmonourtest—bedsandevaluateanddemonstratetheeffecti
6、venessofthelocalizationsystem.Finally,wesumupthispaperandthedirectionsofresearchinthisareaareintroduced.Keywords:Wirelesssensornetworks;DistributedNodeLocalizationalgorithmLocMizationsystemU要j!三些奎兰坚主笙苎堑:兰!!il.1研究背景第一章引言无线传感器网络(WirelessSensorNetwork,WSN)是指由大量成本低廉的,具有感知能力、计算能力、无线通讯能力的传感器节点组成的网
7、络。WSN一般被密集部署在特定的监控区域,节点间以无线、多跳的通信方式,自组织网络拓扑结构,节点间通过协同工作完成单个节点不能完成的全局任务【l“。以前的监控系统经常是将少量的大功率的,具有很强数据分析能力的传感装置安放在离目标有一定距离的观测点进行监控,这样获得的数据很不准确,需要传感装置具有较强的处理分析能力,从混杂的信号中,分析出有用的信息。现在,微机电系统(MEMS,Micro。Electro.MechanismSystem)、片上系统(SOC,SystemOnChip)和无线通信技
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