Understanding the GIOVE-B broadcast codes of the Galileo system

Grace Xingxin Gao, Dennis Akos, Todd Walter, Per Enge

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Europe's second Galileo In-Orbit Validation Element (GIOVE-B) satellite was launched on April 27, 2008, at 22:16 UTC and successfully began transmission on May 7. On the same day, we observed signals in the L1, E5a, and E5b bands, with the L1 spectrum showing multiplexed binary offset carrier (MBOC) modulation. We then identified the generators for the Pseudo Random Noise (PRN) codes in each band. We revealed these codes to be 13- or 14-stage Gold codes, different from the memory codes in the Galileo Interface Control Document (ICD). The GIOVE-B PRN codes have the same code structure as those of the first Galileo test satellite, GIOVE-A. The code generators are the same except for the initial states. However, the signal modulation type in one of the frequency bands is different. The new modulation applied by GIOVE-B ensures more robustness to multipath.

Original languageEnglish (US)
Title of host publication2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008
Pages2086-2090
Number of pages5
DOIs
StatePublished - 2008
Externally publishedYes
Event2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008 - Pacific Grove, CA, United States
Duration: Oct 26 2008Oct 29 2008

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008
Country/TerritoryUnited States
CityPacific Grove, CA
Period10/26/0810/29/08

Keywords

  • GIOVE-B
  • Galileo
  • Global navigation satellite systems
  • Pseudo random noise codes

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications

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