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GNSS Message Structure Optimization

  • Yun ZhouEmail author
  • Yansong Meng
  • Xiaoxia Tao
  • Lei Wang
  • Zhe Su
Conference paper
  • 1.5k Downloads
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 304)

Abstract

The structure designing of satellite clock correction,ephemeris and system time parameters in navigation message directly affects navigating performance such as the time to first fix. Considering the message reading point as a random variable and creating ephemeris acquisition time as a function of the reading time, we integrated the acquisition time of the ephemeris in GPS L2C CNAV random data block and L1C CNAV2 stationary message structure by 95 % confidence level. The designing discrepancy of the GPS, Galileo data structure which is broadcasted on different frequency and its influence to the first time to access positioning information was emphatically discussed. Finally, we presented the key factor of navigation message structure designing to reduce the time to first fix that was ephemeris being consistent during effective time interval, almanac frame proportion of the total frame size should be appropriate and message parameters should be more compact.

Keywords

GNSS message structure Time to first fix 

References

  1. 1.
    Anghileri M (2009) Estimating the time to first fix for GNSS signals theory and simulation results. In: Proceedings of the fourth European workshop on GNSS signals and signal processingGoogle Scholar
  2. 2.
    Betz JW et al (2006) “L1C signal design options,” ION-NTM-2, Institute of Navigation, WashingtonGoogle Scholar
  3. 3.
    Garcia-Pena A, Macabiau C, Escher A-C, Boucheret M-L, Ries L (2009) Comparison between the future GPS L1C and GALILEO E1 OS signals data message performance, In: proceedings of the 2009 international technical meeting of the institute of Navigation, 26–28 Google Scholar
  4. 4.
    IS-GPS-800, Navstar GPS Space Segment / Navigation user segment interfaces. USA: Navstar GPS Joint Program OfficeGoogle Scholar
  5. 5.
    GALILEO ICD, “GALILEO Open Service—Signal in Space Interface Control Document (OS SIS ICD), Draft 1”, European Space Agency / European GNSS Supervisory Authority, February 2008Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Yun Zhou
    • 1
    Email author
  • Yansong Meng
    • 1
  • Xiaoxia Tao
    • 1
  • Lei Wang
    • 1
  • Zhe Su
    • 1
  1. 1.Institute of Space Radio TechnologyXi’anChina

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