gsm-r系统在线干扰监测技术分析

《gsm-r系统在线干扰监测技术分析》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、ABSTRACTABSTRACT：Withtherapidleap—typedevelopmentandinformatizationboostofChinaRailway,GSM—Rtechniqueplaysanincreasinglyimportantroleinrailwaysystemcontr01．Astheschedulingsystemtoensuretherailwaysecurity,GSM—RsystemrequiresahighQoSwirelessnetworktoguara

2、nteethetrainstravelsafely．Sinceinterferenceisoneofthecrucialfactorsthataffectsthequalityandreliabilityofwirelesscommunication，thereareamountofinterferenceproblemsneedtobesolvedinGSM—Rsystem．Moreover,theinterferencedetectionandmonitoringtechniquesarealwa

3、ysthehotandcomplextopicsintheresearchofrailwaycommunication．Theresearchonthegenerationofinterferenceandtheinterferencedetectionandmonitoringtechniquesathomeandabroad，especiallytheinterferencedetectiontechniquesbasedonfrequencyspectrograph，havebeenstudie

4、dinthispaper．What’Smore，theeffectsoffrequencyspectrographinnetworkoptimizationhavebeeninvestigatedindetailwiththeinterferencedetectiononChinaHi曲一speedRailwayandtheCIRoff-linetestcaseatZhuhaiStation．Amongthethreeinterferencetypes，theCO—channelinterferenc

5、eholdsthelargestproportion，themostsignificantinfluence，andthemostdi佑cultonetobedetected．AsGSM—RsystemandChinaMobilesharethe885—889／930—934MHzspectrumaccordingtoregion，GSM—RsystemiseasilyinterferedbyChinaMobile．Itishardfortheconventionalfrequencyspectrog

6、raphtodetecttheinterference，forthattheGSM—Rsignals，whichbasedonGSMsystem，andtheinterferencefromChinaMobileGSMsystemhastheidenticalcharacteristic．Withhi。ghFFTspeedandtheadditionalprobabilitydimension，thereal—timefrequencyspectrographcandetecttheweaksigna

7、lsusingsamefrequencyanddifferenttimeslots．Then，wehaveproposedaninterferencedetectionschemebasedonthereal—timefrequencyspectrographwhichcompensatedthedisadvantageofconventionalinterferencedetection．Theexperimentshavebeencompletedtoprovethepositiveeffecto

8、ftheproposedscheme，andhavegotthemagnituderesolutionandtimeresolutioninCO—channclanalysis．Additionally,wehaveconcludedtheapplicablescenariosfortheproposedschemeaftersimulatingtheCO—channelinterfeFencefromChinaMobileinGSM—Rsystem．F