基于無線Mesh網的車輛導航系統(tǒng)研究.pdf

1、北京交通大學碩士學位論文基于無線Mesh網的車輛導航系統(tǒng)研究姓名：汪念鴻申請學位級別：碩士專業(yè)：交通信息工程及控制指導教師：董海榮20071201』E塞鑾蝗厶堂亟￡堂位淦塞△墾SI曼△￡!ABSTRACTABSTRACT：WirelessMeshNetworks(WMN)arethenextgenerationwirelessIntemetandimportantcomponentofthefourthgenerationmobilec

2、ommunicationsystem，whichhavegooddevelopmentandapplicationprospectsSinceWMNhasmanycharacteristics，suchastheaccuratepositioningabilitythesupportofahighvehiclespeedandahighdatatransmissionrate，andetc，WMNhasalreadyhadsomesuc

3、cessfullapplicationsonIntelligentTransportationSystemsAnewvehiclenavigationsystembasedonWirelessMeshNetworksispresentedinthispaperFollowingisthemainworks：Firstlythebasicframeworkandworkprocessofthevehiclenavigationsystem

4、basedonWirelessMeshNetworksaregiven，anditsmeritsandfeasibilityalealsodiscussedSecondlyaccordingtothecharacteristicsofWirelessMeshNetworksandroadnetsthevehiclespositioningmethodsofintegratedradio／DR／MMbasedonWirelessMeshN

5、etworksandofsingle—fixedreferencepointarepresentedinthefollowingAmethodisalsogiventodetecttrafficparametersusingWMNvehiclepositioningmethodsThirdlybasedoncenterdecisionpathplanning，rapidpathplanningmethodsaledesignedInor

6、dertoimprovethespeedoftheFloydallsourcesshortestpathalgorithm，twooptimizationofFloydalgorithmarestudied，oneistheimprovedFloydalgorithmbasedonthestrategyofgroupingandnumberingandtheotheristheimprovedFloydalgorithmbasedont

7、hestrategyofdiseonnexionWhenthevehiclesneedtodopathsreplanning，amethodofDijkstrasingle—SouseshortestpathalgorithmisalsoprovidedFinallyamodulationmethodofsymbolspacingmodulationispresentedbasedondirectsequencespreadspectr

8、umtechnologyThemethodonhowtouseitsmodulationmethodtoimprovetheperformancesuchasdatatransmissionratepowerconsumptionandintersymbolinterferenceofWirelessMeshNetworksisanalyzedKEYWORDS：VehicleNavigationSystem；WirelessMeshNe