OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Fast acquisition unit for GPS-GALILEO receivers in space environment

Calmettes, Vincent and Dion, Arnaud and Boutillon, Emmanuel and Liegeon, Emmanuel Fast acquisition unit for GPS-GALILEO receivers in space environment. (2008) In: ION : Institute of Navigation - National Technical Meeting, 28-30 Jan 2008, San Diego, United States .

[img] (Document in English)

PDF (Author's version) - Depositor and staff only - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
153kB

Abstract

In contrast with ground applications the GNSS constellations are not optimized for space applications. Moreover, the different types of mission, i.e. Low Earth Orbit (LEO), Medium Earth Orbit (MEO), Geosynchronous Earth Orbit (GEO), have all specific requirements. Our motivation is to define an «Ubiquitous GNSS receiver (UGNSS)», i.e. a single receiver able to cope with all types of mission. The analyze of the different types of mission shows that the UGNSS receiver should deal with both GPS and GALILEO signals as well as other future GNSS systems. It should also be able to have fast synchronization and robust tracking with extremely wide Doppler range(LEO mission)or be able to cope with very weak signals (GEO mission).In order to fulfill those requirements, we define the specifications of a reconfigurable decoder that allows to allocate the hardware resources to the type of processing required by the mission. In this paper we consider the algorithm which aims to acquire GNSS signals. This algorithm is based on two IP cores which perform a 8 points FFT and a 2048 points FFT. These two cores are configured to achieve GNSS signal acquisition in any space mission, by taking into account the signal structure (BPSK(1)or BOC(1,1))and the signal features(C/No ratio, Doppler span and Doppler rate).

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National des Etudes Spatiales - CNES
French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Ecole Nationale de l'Aviation Civile - ENAC
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Other partners > Rockwell Collins (FRANCE)
Other partners > Thales (FRANCE)
Other partners > Telecom ParisTech (FRANCE)
Other partners > Université de Bretagne Occidentale - UBO (FRANCE)
Other partners > Direction Générale de l’Aviation Civile - DGAC (FRANCE)
Other partners > Telecom Bretagne (FRANCE)
Other partners > Université de Bretagne Sud - UBS (FRANCE)
Other partners > Université Européenne de Bretagne - UEB (FRANCE)
Laboratory name:
Statistics:download
Deposited By: Arnaud Dion

Repository Staff Only: item control page