GNSS信号模拟器通道群时延标定方法

李世光; 寇艳红; 杨军; 王伟

doi:10.13700/j.bh.1001-5965.2015.0007

GNSS信号模拟器通道群时延标定方法

doi: 10.13700/j.bh.1001-5965.2015.0007

李世光¹,
寇艳红^2, ,,
杨军¹,
王伟¹

1.
中国航天科工集团第二研究院计量与校准技术国防科技重点实验室, 北京 100039
2. 北京航空航天大学电子信息工程学院, 北京 100191

基金项目: 国家自然科学基金(61271197)

详细信息

作者简介:
李世光(1988-),男,河南南阳人,博士研究生,lsgruc@163.com

通讯作者:
寇艳红(1969-),女,河南禹州人,副教授,buaakyh@126.com,主要研究方向为卫星导航、无线通信和数字信号处理技术.

中图分类号: V448.25⁺3
计量
- 文章访问数: 1107
- HTML全文浏览量: 51
- PDF下载量: 676
- 被引次数: 0
出版历程
- 收稿日期: 2015-01-04
- 修回日期: 2015-01-23
- 网络出版日期: 2015-12-20

Group delay calibration method for GNSS signal simulator channel

1.
National Key Laboratory of Metrology and Calibration Technology, The Second Institute of China Aerospace Science and Technology Corporation, Beijing 100039, China
2. School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 传统的全球导航卫星系统(GNSS)信号模拟器通道群时延标定方法有相位翻转点法和相关峰法两种,两者均在零伪距或固定伪距的特殊仿真场景下进行测量,且在通道传输特性非理想的情况下测得的群时延均存在偏差.提出了基于闭环伪距测量的模拟器通道群时延标定方法,并设计实现了GNSS信号模拟器通道群时延标定系统.首先,采用高速直接射频采样存储系统对模拟器正常星座动态仿真场景下输出的导航信号和秒脉冲(1 PPS)信号同时进行记录.其次,使用软件接收机对信号进行捕获跟踪,利用三次样条插值判定1 PPS上升沿位置作为伪距观测历元时刻,对软件接收机的伪距观测量和模拟器仿真的伪距记录值做数据比对,得到模拟器的群时延标定值.最后,分别利用上述方法对两种商用模拟器的群时延进行了标定,实验结果表明,闭环伪距测量法有效可行,测量不确定度优于0.7 ns.
- 全球导航卫星系统(GNSS)信号模拟器 /
- 群时延 /
- 直接射频采样 /
- 软件接收机 /
- 三次样条插值
Abstract: Two kinds of traditional group delay calibration methods for global navigation satellite system (GNSS) signal simulator channels have been reported so far,which are phase transition point method and correlation peak method. Both of them measure the group delay in a special simulation scenario with zero or fixed pseudorange, and the measurements under non-ideal channel transmission characteristics are biased estimates of the group delay. A group delay calibration method for simulator channel based on closed-loop pseudorange measurement was proposed, and the corresponding group delay calibration system for GNSS signal simulator channels were designed. Firstly, the navigation signal and one pulse per second (1 PPS) signal outputted by the simulator in normal constellation dynamic scenariowere recorded simultaneously by a high-speed direct radio freqency (RF) sampling and storage system. Secondly, the navigation signal was captured and tracked by a software receiver, and the 1 PPS signal rising edge was determined by cubic spline interpolation and used as the pseudorange measurement epoch. Then the group delay can be obtained by data comparison between the software receiver-measured pseudorange and the simulator-recorded true pseudorange. Finally, the group delays of two different commercialsimulators were calibrated employing all the above methods. The experimental results show that the proposed method is effectively feasible and the measurement uncertainty reaches below 0.7 ns.
- global navigation satellite system(GNSS) signal simulator /
- group delay /
- direct radio freqency (RF) sampling /
- software receiver /
- cubic spline interpolation

HTML全文

参考文献(21)

[1]	Landis G P,White J.Limitation of GPS receiver calibrations[C]//Proceedings of 34th Annual Precise Time and Time Interval (PTTI) Meeting.Manassas,VA:ION,2002:325-332.
[2]	Plumb J,Larson K M,White J,et al.Absolute calibration of a geodetic time transfer system[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2005,52(11):1904-1911.
[3]	冯富元.GPS信号模拟源及测试技术研究和实现[D].北京:北京邮电大学,2009. Feng F Y.GPS signal simulation source test technology research and implementation[D].Beijing:Beijing University of Posts and Telecommunications,2009(in Chinese).
[4]	Boulton P,Read A,Wong R.Formal verification testing of Galileo RF constellation simulators[C]//Proceedings of the 20th International Technical Meeting of the Satellite Division of the Institute of Navigation(ION GNSS 2007).Manassas,VA:ION,2007:1564-1575.
[5]	Grunert U,Thoelert S,Denks H,et al.Using of spirent GPS/Galileo HW simulator for timing receiver calibration[C]//Position,Locationand Navigation Symposium.New York:IEEE/ION,2008:77-81.
[6]	Proia A,Cibiel G.Progress report of CNES activities regarding the absolute calibration method[C]//Proceedings of the 42th Annual Precise Time and Time Interval (PTTI) Systems and Applications Meeting.Manassas,VA:ION,2010:16-18.
[7]	Proia A,Cibiel G,White J,et al.Absolute calibration of GNSS time transfer systems:NRL and CNES techniques comparison[C]//2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum(FCS).Piscataway,NJ:IEEE Press,2011:1-6.
[8]	林红磊,牟卫华,王飞雪,等.卫星导航系统信号模拟器通道零值标定方法研究[J].导航定位学报,2013,1(4):61-64. Lin H L,Mou W H,Wang F X,et al.Research on calibration of GNSS signal simulator[J].Journal of Navigation and Positioning,2013,1(4):61-64(in Chinese).
[9]	Cartmell A.Considerations for calibration of frequency dependent delays[C]//Proceedings of the 13th International Technical Meeting of the Satellite Division of the Institute of Navigation(ION GNSS 2000).Manassas,VA:ION,2000:799-809.
[10]	Parkinson B W,Spilker J J.The global positioning system:Theory and applications.Volume I[M].Reston:AIAA,1996:410.
[11]	吴海涛,李孝辉,卢晓春等.卫星导航系统时间基础[M].北京:科学出版社,2011:147-148. Wu H T,Li X H,Lu X C.Time base of GNSS[M].Beijing:Science Press,2011:147-148(in Chinese).
[12]	Ma C,Lachapelle G,Cannon M E.Implementation of a software GPS receiver[C]//Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation(ION GNSS 2004).Manassas,VA:ION,2004:21-24.
[13]	Tetewsky A,Soltz A,Fuhry D,et al.Validating the validating tool:Defining and measuring GPS simulator specifications[C]//Proceedings of the 10th International Technical Meeting of the Satellite Division of the Institute of Navigation(ION GPS 1997).Manassas,VA:ION,1997:1681-1695.
[14]	IS-GPS-200G.Navstar GPS space segment/navigation user interfaces[S].CA:ARINC Research Corporation,2012:74-75.
[15]	李庆扬,王能超,易大义.数值分析[M].5版.北京:清华大学出版社,2008:41-42. Li Q Y,Wang N C,Yi D Y.Numerical analysis[M].5th ed.Beijing:Tsinghua University Press,2008:41-42(in Chinese).
[16]	谢钢.GPS原理与接收机设计[M].北京:电子工业出版社,2009:71-72. Xie G.Principles of GPS and receiver design[M].Beijing:Publishing House of Electronics Industry,2009:71-72(in Chinese).
[17]	van Dierendonck A J,Fenton P,Ford T.Theory and performance of narrow correlator spacing in a GPS receiver[J].Navigation,1992,39(3):265-283.
[18]	Betz J W,Kolodziejski K R.Extended theory of early-late code tracking for a bandlimited GPS receiver[J].Navigation,2000,47(3):211-226.
[19]	Kaplan E D,Hegarty C J.Understanding GPS principles and applications[M].2nd ed.Norwood,MA:Artech House,2006:173-178.
[20]	Kou Y H,Sui J T,Chen Y B,et al.Test of pseudorange accuracy in GNSS RF constellation simulator[C]//Proceedings of 25th International Technical Meeting of the Satellite Division of the Institute of Navigation 2012 (ION GNSS 2012).Manassas,VA:ION,2012:161-173.
[21]	Zhang H,Kou Y H.Single-SV timing in GNSS signal simulator and receiver closed-loop testing[C]//Proceedings of the 45th Annual Precise Time and Time Interval Systems and Applications Meeting.Manassas,VA:ION,2013:94-100.