Galileo GIOVE-A broadcast E5 codes and their application to acquisition and tracking

Grace Xingxin Gao, David S. De Lorenzo, Alan Chen, Sherman C. Lo, Dennis M. Akos, Todd Walter, Per Enge

Research output: Contribution to conferencePaper

Abstract

In this paper, we decode the PRN codes of the E5a and E5b signals broadcast by the Galileo GIOVE-A test satellite. The Galileo E5 band overlaps with Distance Measuring Equipment (DME) and Tactical Air Navigation (TACAN) bands. These navigation systems emit high-power pulses, causing severe interference to E5 signals and thus challenging the decoding process. We apply the 1.8 meter dish of the Stanford GNSS Monitor System to receive the satellite signals. The received data are processed in a chain of signal conditioning, Doppler wipeoff, secondary code wipeoff, code sequence demodulation, and code generator derivation. Two primary code sequences are revealed in each frequency band, E5a-I, E5a-Q, E5b-I, and E5b-Q. The E5 signals have a chip rate of 10.23 Mbps. All four primary codes have a period of 1msec with 10230 bits and are modulated by secondary codes. The secondary code of E5a-I has 20 bits and that of E5b-I has 4 bits. The secondary codes of E5a-Q and E5b-Q are both 100 bits.

Original languageEnglish (US)
Pages936-946
Number of pages11
StatePublished - Aug 23 2007
Externally publishedYes
EventInstitute of Navigation National Technical Meeting, NTM 2007 - San Diego, CA, United States
Duration: Jan 22 2007Jan 24 2007

Other

OtherInstitute of Navigation National Technical Meeting, NTM 2007
CountryUnited States
CitySan Diego, CA
Period1/22/071/24/07

ASJC Scopus subject areas

  • Engineering(all)

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    Gao, G. X., De Lorenzo, D. S., Chen, A., Lo, S. C., Akos, D. M., Walter, T., & Enge, P. (2007). Galileo GIOVE-A broadcast E5 codes and their application to acquisition and tracking. 936-946. Paper presented at Institute of Navigation National Technical Meeting, NTM 2007, San Diego, CA, United States.