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1、萬方數(shù)據(jù)摘要多徑信號是影響GNSS(GlobalNavigationSatelliteSystem)高精度接收機測量精度的顯著誤差源，多徑抑制方法一直是衛(wèi)星導(dǎo)航領(lǐng)域的瓶頸和研究熱點。本文以“十一五”及“十二五”某預(yù)研課題為背景，重點研究了GNSS接收機的抗多徑技術(shù)。首先，研究了多徑信號特性及其對接收機測距性能的影響，通過建立存在多徑時的接收信號模型，分析了多徑環(huán)境下的自相關(guān)函數(shù)和延遲鎖定環(huán)。其次，研究了抗多徑天線技術(shù)，通過分析天線性能對多徑信號的影響，提出了天線輻射體和扼流圈的設(shè)計原則，并通過測試驗證了抗多徑天線
2、的性能。再次，研究了抗多徑算法，通過對目前常用的多徑消除技術(shù)的分析，選擇了基于序列相關(guān)器的延遲鎖定環(huán)補償技術(shù)作為多徑消除算法，并采用實驗室測試和實際收星測試驗證了該算法的有效性。最后，研究了抗多徑性能測試評估手段，從多徑環(huán)境軟件仿真系統(tǒng)構(gòu)建和抗多徑實驗室模擬測試環(huán)境構(gòu)建兩方面進行了闡述和驗證。本文的研究成果可以為GNSS高精度接收機抗多徑技術(shù)研究提供參考依據(jù)。關(guān)鍵詞：多徑信號抗多徑天線扼流圈序列相關(guān)器延遲鎮(zhèn)定環(huán)萬方數(shù)據(jù)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噸．Finally,theanti—multipathperformancetest啦andevaluationmethodsareanalyzed．Theyaledescribedand
8、validatedfromtheaspectoftheconstructionofmultipathenvironmentsoftwaresimulationsystemandtheconstructionofanti-multipathlaboratorysimulationtestingenvironment．Theresearchprovidesguidancean
