Article,
A First-of-a-Kind Galileo Receiver Breadboard to Demonstrate Galileo Tracking Algorithms and Performances
Proc. of the Navitec Conference, ESA-ESTEC, (2004)
Abstract
The future Galileo satellites will transmit a wide variety of signals
modulated on four different carriers (E5a, E5b, E6 and L1). Novel
signal processing techniques are required for these signals due primarily
to the new modulation types (BOC and AltBOC), the presence of Pilot
and Data channel at all frequencies and the bit demodulation implying
deinterleaving and frame-by-frame Viterbi decoding. In the framework
of the C0 phase of the Galileo development, Septentrio has developed
a Galileo receiver breadboard aiming at demonstrating acquisition,
tracking and bit demodulation of all Galileo signals, analysing the
measurement accuracy, and assessing the feasibility of implementation
of the signal processing. As no Galileo satellite is present at the
moment, a simple Galileo signal transmitter has been developed as
well. The purpose of this paper is to present and analyse results
of Galileo signal tracking using real hardware. First the Galileo
signal characteristics and the associated signal processing are reviewed.
Then the architecture of the breadboard and of the signal transmitter
is described. Finally, tracking performance is evaluated based on
real data.
