Galileo E6B/C信號接收機設計
2020年電子技術應用第11期
何旭蕾1,2,劉 成3,王 威3,李 健1,劉學勇1,楊 穎1,巴曉輝1,2,陳 杰1
1.中國科學院微電子研究所,北京100029;2.中國科學院大學,北京100049;3.中國衛星導航工程中心,北京100094
摘要: Galileo系統通過E6B/C信號提供精密單點定位服務和身份驗證服務。2019年1月歐盟公布了Galileo系統E6B/C信號的擴頻碼,參考歐盟發布文件,對E6B/C信號的載波頻率、調制方式、主碼、二級碼、數據編碼方案和電文結構進行了描述。設計了E6B/C信號捕獲跟蹤方案,通過短時相關結合FFT的方案對天空中的Galileo衛星E6B/C信號進行捕獲,并用窄帶寬帶功率比方法和矩方法估計E6C和E6B的載噪比。同時對當前衛星播發的E6B電文信息進行了分析,分析結果表明當前Galileo的E6B信號還未開始提供PPP服務。
中圖分類號: TN911.6;P228.4
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.200220
中文引用格式: 何旭蕾,劉成,王威,等. Galileo E6B/C信號接收機設計[J].電子技術應用,2020,46(11):8-11,17.
英文引用格式: He Xulei,Liu Cheng,Wang Wei,et al. The design of Galileo E6B/C receiver[J]. Application of Electronic Technique,2020,46(11):8-11,17.
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.200220
中文引用格式: 何旭蕾,劉成,王威,等. Galileo E6B/C信號接收機設計[J].電子技術應用,2020,46(11):8-11,17.
英文引用格式: He Xulei,Liu Cheng,Wang Wei,et al. The design of Galileo E6B/C receiver[J]. Application of Electronic Technique,2020,46(11):8-11,17.
The design of Galileo E6B/C receiver
He Xulei1,2,Liu Cheng3,Wang Wei3,Li Jian1,Liu Xueyong1,Yang Ying1,Ba Xiaohui1,2,Chen Jie1
1.Institute of Microelectronics of Chinese Academy of Sciences,Beijing 100029,China; 2.University of Chinese Academy of Sciences,Beijing 100049,China;3.China Satellite Navigation Office,Beijing 100094,China
Abstract: Galileo system provides commercial services including precise point positioning and authentication through E6B/C signals. In January 2019, the European Union announced the spreading code of the Galileo system′s E6B/C signal. This article refers to the European Union′s published document of the E6B/C signal and describes the carrier frequency, modulation scheme, primary codes, secondary codes, data coding scheme, and message structure. This article introduces the scheme of acquisition and tracking of the E6B/C signal, which acquires the E6B/C signals in the sky through the short-time correlation and FFT scheme,then uses the narrowband-wideband power ratio method and moments method to estimate the CNR of E6C and E6B.At the same time, this paper analyzes the current E6B message information that transmitted by current satellites. It shows that Galileo′s E6B signal has not yet started to provide PPP services.
Key words : E6B/C;receiver design;short-time correlation and FFT;CNR estimation
0 引言
伽利略(Galileo)是由歐盟研制和建立的全球衛星導航系統,提供開放服務(Open Service,OS)、商業服務(Commercial Service,CS)、公共特許服務(Public Regulated Service,PRS)和搜尋救援服務(Search and Rescue Service,SAR)。當前天空中有26顆中圓地球軌道衛星(Medium Earth Orbit,MEO),包括22顆FOC(Full Operational Capability)衛星和4顆IOV(In-orbit Validation)衛星,目前26顆衛星中有22顆可用衛星和4顆不可用衛星[1]。表1列出了Galileo系統播發信號的基本情況。
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作者信息:
何旭蕾1,2,劉 成3,王 威3,李 健1,劉學勇1,楊 穎1,巴曉輝1,2,陳 杰1
(1.中國科學院微電子研究所,北京100029;2.中國科學院大學,北京100049;3.中國衛星導航工程中心,北京100094)
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