MBOC信号非相干联合捕获性能分析
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摘要
MBOC(multiplexed BOC)调制信号是由BOC(1,1)和BOC(6,1)组成,其实现方式有三种,即北斗B1C的QMBOC(quadrature multiplexed BOC),GPS L1C的TMBOC(time multiplexed BOC)以及Galileo E1B/C的CBOC(composite BOC)。北斗B1C、GPS L1C和Galileo E1OS信号均采用导频和数据双通道的结构,利用该特点,采用导频和数据联合捕获的方法,有效提高捕获灵敏度。主要分析非相干联合捕获方法的性能,从检测概率和运算量对比分析联合捕获对三种MBOC调制信号的影响,得出联合捕获对峰峰比改善的理论值;采用实际信号对联合算法进行验证,结果表明联合捕获对峰峰比改善的理论值基本吻合。
Multiplexed binary offset carrier(MBOC)is consisted of BOC(1,1)and BOC(6,1),and there are three MBOC signals:the quadrature multiplexed binary offset carrier(QMBOC)adopted by BDS,the composite binary offset carrier(CBOC)proposed by Galileo,and the time-multiplexed binary offset carrier(TMBOC)for GPS.BeiDou B1 C,GPS L1 Cand Galileo E1 OS signals are consisted of two different components,the pilot and the data channels.Pilot and data channels combined allow recovering all the available power improving the acquisition performance and providing more reliable signal detection.The paper focuses on analyzing the performance of conventional pilot acquisition and joint acquisition with different MBOC signals,compared MBOC signal detection probabilities and calculation cost between joint acquisition and conventional acquisition with pilot channel.Finally,the theoretical value of the joint acquisition of peak to peak ratio is obtained.Based on real signals,this paper carries out joint acquisition performance among different MBOC signals.The results show that the joint acquisition of peak to peak ratio is consistent with the theoretical value.
Multiplexed binary offset carrier(MBOC)is consisted of BOC(1,1)and BOC(6,1),and there are three MBOC signals:the quadrature multiplexed binary offset carrier(QMBOC)adopted by BDS,the composite binary offset carrier(CBOC)proposed by Galileo,and the time-multiplexed binary offset carrier(TMBOC)for GPS.BeiDou B1 C,GPS L1 Cand Galileo E1 OS signals are consisted of two different components,the pilot and the data channels.Pilot and data channels combined allow recovering all the available power improving the acquisition performance and providing more reliable signal detection.The paper focuses on analyzing the performance of conventional pilot acquisition and joint acquisition with different MBOC signals,compared MBOC signal detection probabilities and calculation cost between joint acquisition and conventional acquisition with pilot channel.Finally,the theoretical value of the joint acquisition of peak to peak ratio is obtained.Based on real signals,this paper carries out joint acquisition performance among different MBOC signals.The results show that the joint acquisition of peak to peak ratio is consistent with the theoretical value.
引文
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[13]万青.现代化GNSS数据/导频信号联合捕获算法的研究[D].哈尔滨:哈尔滨工业大学,2010.
[2]中国卫星导航系统管理办公室.北斗卫星导航系统空间信号接口控制文件公开服务信号B1C、B2a(测试版)[K].2017.
[3]SIDDIQUI B A,ZHANG J,BHUIYAN M Z H,et al.Joint data-pilot acquisition and tracking of Galileo E1open service signal[C]//Ubiquitous Positioning Indoor Navigation and Location based Service,Kirkkonummi,Finland:IEEE,2010:1-7.
[4]YANG C,SOLOVIEV A.Joint acquisition of GNSS codes via coherent combining of multi-frequency composite quadrature signals[C]//Proceedings of the 2016International Technical Meeting of the Institute of Navigation,Monterey,California:ION,2016:805-819.
[5]BORIO D,PRESTI L L.Data and pilot combining for composite GNSS signal acquisition[J].International Journal of Navigation&Observation,2008:1-12.
[6]林红磊,唐小妹,刘瀛翔,等.一种含导频GNSS信号的通道组合捕获检测量的设计与优化[J].中南大学学报:自然科学版,2014,45(4):1105-1112.
[7]田丰,唐小妹,欧钢.数据和导频通道的功率加权联合捕获算法[J].国防科技大学学报,2016,38(2):112-116.
[8]中国卫星导航系统管理办公室.北斗卫星导航系统空间信号接口控制文件公开服务信号B1C[K].1.0版.2017.
[9]European Union.European GNSS(Galileo)Open Service Signal in Space Interface Control Documen Ref:OS SISICD[K].2010.
[10]鲁郁.GPS全球定位接收机:原理与软件实现[M].北京:电子工业出版社,2009.
[11]AVELLONE G,FRAZZETTO M,MESSINA E.On the acquisition ambiguity for Galileo BOC(n,n)modulated signals[C]//IEEE International Conference on Communications,Glasgow,UK:IEEE,2007:4438-4443.
[12]SUN D,CUI X,ZHU Y,et al.Fast acquisition algorithm of GPS L1Csignal based on thesparse fast Fourier transform[C]//Proceedings of the International Technical Meeting of the Institute of Navigation,California,USA:ION,2015:484-492.
[13]万青.现代化GNSS数据/导频信号联合捕获算法的研究[D].哈尔滨:哈尔滨工业大学,2010.