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ID:46622332
大小:1.65 MB
页数:7页
时间:2019-11-26
《BDS接收机星间载波相位偏差》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、第35卷第6期2016年12月飞行器测控学报JournalofSpacecraftTT&CTechnologyV01.35No.6December2016引用格式:阮航,吴海玲,刘成,等.BDS接收机星问载波相位偏差EJ].飞行器测控学报,2016,35(6):463—469.RuanHang,wuHailing,LiuCheng,eta1.Inter-satellitecarrierphasebiasofBDSreceiverEJ-1.JournalofSpacecraftTT&cTech—nology,2016,35(6):463—469.BDS接收机星间载波相位偏差”阮航,吴海玲,刘成,
2、李作虎(北京跟踪与通信技术研究所·北京·100094)摘要:BDS(BeiDousatellitenavigationSystem,北斗卫星导航系统)的MEO/IGSO(MediumEarthOrbit/In—clinedGeosynchronousSatelliteOrbit,中圆地球轨道/倾斜地球同步轨道)卫星在D1导航电文上调制了NH(Neumann-Hoffman,奈曼一霍夫曼)二次编码,而在GE0(GeostationaryEarth0rbit,地球静止轨道)卫星上未使用。利用北斗ME0/IGS0和GE0卫星进行差分定位时,采用不同NH码符号映射规则的接收机之间会出现半周栽波相位偏差
3、的问题,严重影响RTK(Real—TimeKinematic,实时动态差分)应用。通过分析半周载波相位偏差的形成机理,从单差、双差、三差应用角度分别研究了半周载波相位偏差的影响。分析结果表明,接收机NH码符号映射规则与卫星不一致时,接收机直接用乘法器对NH码解调将存在反相,也即引入了半周载波相位偏差;在满足特定条件下,单差和双差应用时会存在半周载波相位偏差的问题;三差应用时不存在半周载波相位偏差的问题。最后,提出了需在北斗接口控制文件中明确卫星NH码调制或映射规则的修订建议。关键词:北斗卫星导航系统(BDS);奈曼一霍夫曼(NH)码;载波相位偏差;接口控制文件中图分类号:V474.2+5;P2
4、28.4文献标志码:A文章编号:1674—5620(2016)06—0463—07DOI:10.7642/j.issn.1674-5620.2016-06—0463—07Inter-SatelliteCarrierPhaseBiasofBDSReceiverRUANHang,WUHailing,LIUCheng,LIZuohu(BeijingInstituteofTrackingandTelecommunicationsTechnology,Beijing100094)Abstract:TheD1NAVmessagesbroadcastedbytheMediumEarth0rbit/Incli
5、nedGeosynchronousSatelliteOrbit(MEO/IGSO)satellitesofBeiDousatellitenavigationSystem(BDS)aremodulatedbyaNeumann-Hoffman(NH)secondarycode,whiletheD2NAVmessagesbroadcastedbytheGeostationaryEarthOrbit(GEO)satellitesdonot.InthecaseofdifferentialpositioningbetweenBDSMEO/IGSOandGEOsatellites,half-cyclecar
6、rierphasebiasmaybeinducedbetweenreceiversthattakedifferentNHsignconventions,whichresultsinafailurewhenperform—ingReal—TimeKinematic(RTK)positioning.Formationmechanismofthehalf-cyclecarrierphasebiasisanalyzed,anditsimpactonsingle,double,andtripledifferenceisdiscussed.TheoreticalanalysisshowsthattheNH
7、signcon—ventiondifferencebetweenBDSsatellitesandreceiversbringsaphaseopposition,i.e.,halfacyclephasebias,aftertheNHcodebeingdemodulatedbyusingmultiplicationinreceivers;onlyunderseveralspecifiedconditi
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