欢迎来到天天文库
浏览记录
ID:39973063
大小:1.91 MB
页数:12页
时间:2019-07-16
《Petovello--Choosing the Coherent Integration Time for Kalman Filter Based Carrier Phase Tracking of GNSS Signals》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、GPSSolut(2011)15:345356DOI10.1007/s10291-010-0194-4ORIGINALARTICLEChoosingthecoherentintegrationtimeforKalmanfilter-basedcarrier-phasetrackingofGNSSsignalsCillianO’Driscoll•MarkG.Petovello•Ge´rardLachapelleReceived:2June2010/Accepted:10November2010/Publishedonline:9December2010Ó
2、Springer-Verlag2010AbstractCarrierphasebasedpositioningusingGlobalIntroductionNavigationSatelliteSystem(GNSS)signalscanprovidecentimeter-levelaccuracy;however,todosorequiresHigh-sensitivityGNSS(HSGNSS)receiversarecapableofrobust,continuoustrackingofthephaseofthereceivedprovidin
3、gpseudorangemeasurementsforsatellitesignalssignal.Thephase-lockedloopistypicallytheweakestlinkattenuatedbyupto30dBormore.Althoughimpressive,inGNSSsignalprocessing,withfrequentcycleslipsandsuchreceiversaregenerallyoflimitedbenefittoapplica-lossoflockoccurringatlowersignal-to-nois
4、eratios.Onetionsrequiringcentimeterreal-timekinematic(RTK)waytoimprovethesignal-to-noiseratioistoincreasepositioningthatrequirescontinuousandhigh-qualitycar-thecoherentintegrationtime;howeverdoingsoreducesrier-phasemeasurementsinthesame(orsimilar)degradedtheloopupdaterate,there
5、bydegradingperformance.Thisenvironments.Unfortunately,trackingrequirementsforthepaperinvestigatesthistrade-offbetweensensitivityandcarrierphasearemuchmorestringentthanthoseforloopupdateratebyinvestigationoftheKalmanfilter-basedpseudorangeorcarrierfrequency,andlossofcarrierphaset
6、rackingloop.Itisshownthatitispossibletochooseanlockislikelywhenthereceivedsignalsareweakerthanoptimalintegrationtimeforagivenapplication.Arela-normal.Assuch,RTKpositioninghastraditionallybeentivelystraightforwardprocedureisgiventodeterminethisreservedforenvironmentswheretheGNSS
7、signalsoptimalvalue.Theresultsareconfirmedthroughreal-timereceivedattheusersantennahaveminimalattenuation.kinematicprocessingoflivesatellitesignals.InmostGNSSreceivers,thecarrier-phasemeasurementisobtainedusingaphasetrackingloop(vanDierendonckKeywordsGNSSUltra-tightintegration
8、Coherent1996;Wardetal.2006),whichisessentiallyadynamic
此文档下载收益归作者所有