gnss高精度接收机抗多径技术的研究

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1、万方数据摘要多径信号是影响GNSS(GlobalNavigationSatelliteSystem)高精度接收机测量精度的显著误差源，多径抑制方法一直是卫星导航领域的瓶颈和研究热点。本文以“十一五”及“十二五”某预研课题为背景，重点研究了GNSS接收机的抗多径技术。首先，研究了多径信号特性及其对接收机测距性能的影响，通过建立存在多径时的接收信号模型，分析了多径环境下的自相关函数和延迟锁定环。其次，研究了抗多径天线技术，通过分析天线性能对多径信号的影响，提出了天线辐射体和扼流圈的设计原则，并通过测试验证了抗多径天线

2、的性能。再次，研究了抗多径算法，通过对目前常用的多径消除技术的分析，选择了基于序列相关器的延迟锁定环补偿技术作为多径消除算法，并采用实验室测试和实际收星测试验证了该算法的有效性。最后，研究了抗多径性能测试评估手段，从多径环境软件仿真系统构建和抗多径实验室模拟测试环境构建两方面进行了阐述和验证。本文的研究成果可以为GNSS高精度接收机抗多径技术研究提供参考依据。关键词：多径信号抗多径天线扼流圈序列相关器延迟镇定环万方数据AbstractMultipathsignalisamajorerrorsourccthatsi

3、gnificantlyaffectsthemeasurementofGNSS(GlobalNavigationSatelliteSystem)high-precisionreceiver,andmulfipathrejectionhasalwaysbeenthebottleneckandtheresearchfocusinthestudyofsatellitenavigation．Takingapre-researchsubjectof‘'theEleventhFive-YearPlan'’and"theTwel

4、fthFive-YearPlan'’asitsbackground,thethesisfocusesontheGNSS(GlobalNavigationSatelliteSystem)receiveranti—multipathtechnology．Firstly,thethesismakesanexplorationofthecharacteristicsofmultipathsignalsanditseffectsupontherangiIlgperformanceofthereceiver．Byestabl

5、ishingthereceivingsignalmodelundermultipathenvironment,theautocorrelationfunctionandthedelaylockloopareanalyzed．Secondly,theanti-multipathantennatechnologyisstudied．Byanalyzingtheimpactoftheperformanceoftheantennaonmultipathsignals，thedesignprinciplesoftheant

6、ennaradiatorandthechokeringareproposed．Theperformanceoftheanti-multipathantennaisalsovalidatedthroughtesting．Thirdly,itelaboratestheanti—multipathalgorithms．Throughtheanalysisofthecurrentlyusedmultipathmitigationtechnology,thedelaylockloopcompensationtechnolo

7、gybasedonthesequencecorrelatorasmultipathmitigationalgorithmisselected，andthevalidityofthealgorithmisverifiedbyusinglaboratorytestingandactualreceivingsatellitestest吨．Finally,theanti—multipathperformancetest啦andevaluationmethodsareanalyzed．Theyaledescribedand

8、validatedfromtheaspectoftheconstructionofmultipathenvironmentsoftwaresimulationsystemandtheconstructionofanti-multipathlaboratorysimulationtestingenvironment．Theresearchprovidesguidancean