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1、第35卷第6期2016年12月飛行器測(cè)控學(xué)報(bào)JournalofSpacecraftTT&CTechnologyV01.35No.6December2016引用格式:阮航,吳海玲,劉成,等.BDS接收機(jī)星問(wèn)載波相位偏差EJ].飛行器測(cè)控學(xué)報(bào),2016,35(6):463—469.RuanHang,wuHailing,LiuCheng,eta1.Inter-satellitecarrierphasebiasofBDSreceiverEJ-1.JournalofSpacecraftTT&cTech—nology,2016,35(6):463—469.BDS接收機(jī)星間載波相位偏差”阮航,吳海玲,劉成,
2、李作虎(北京跟蹤與通信技術(shù)研究所·北京·100094)摘要:BDS(BeiDousatellitenavigationSystem,北斗衛(wèi)星導(dǎo)航系統(tǒng))的MEO/IGSO(MediumEarthOrbit/In—clinedGeosynchronousSatelliteOrbit,中圓地球軌道/傾斜地球同步軌道)衛(wèi)星在D1導(dǎo)航電文上調(diào)制了NH(Neumann-Hoffman,奈曼一霍夫曼)二次編碼,而在GE0(GeostationaryEarth0rbit,地球靜止軌道)衛(wèi)星上未使用。利用北斗ME0/IGS0和GE0衛(wèi)星進(jìn)行差分定位時(shí),采用不同NH碼符號(hào)映射規(guī)則的接收機(jī)之間會(huì)出現(xiàn)半周栽波相位偏差
3、的問(wèn)題,嚴(yán)重影響RTK(Real—TimeKinematic,實(shí)時(shí)動(dòng)態(tài)差分)應(yīng)用。通過(guò)分析半周載波相位偏差的形成機(jī)理,從單差、雙差、三差應(yīng)用角度分別研究了半周載波相位偏差的影響。分析結(jié)果表明,接收機(jī)NH碼符號(hào)映射規(guī)則與衛(wèi)星不一致時(shí),接收機(jī)直接用乘法器對(duì)NH碼解調(diào)將存在反相,也即引入了半周載波相位偏差;在滿足特定條件下,單差和雙差應(yīng)用時(shí)會(huì)存在半周載波相位偏差的問(wèn)題;三差應(yīng)用時(shí)不存在半周載波相位偏差的問(wèn)題。最后,提出了需在北斗接口控制文件中明確衛(wèi)星NH碼調(diào)制或映射規(guī)則的修訂建議。關(guān)鍵詞:北斗衛(wèi)星導(dǎo)航系統(tǒng)(BDS);奈曼一霍夫曼(NH)碼;載波相位偏差;接口控制文件中圖分類號(hào):V474.2+5;P2
4、28.4文獻(xiàn)標(biāo)志碼:A文章編號(hào):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