26 April 2012

GPS World at ENC mentioned a NavSAS researcher, Davide Margaria

GPS World mentioned Davide Margaria, a researcher from the NavSAS lab, in its live report from the European Navigation Conference - ENC in Poland:

Davide Margaria from Istituto Superiore Mario Boella presented a research regarding “Acquisition and Tracking of Galileo IOV E5 signals,”  important for the safety-of-life service planned by Galileo.
The Galileo satellite system currently consists of GIOVE-A and B, the two experimental satellites dating from 2005 and 2006, and the two in-orbit validation (IOV) satellites launched in November 2011, the Proto-Flight Model (PFM), and the Flight Model 2 (FM2).The FM2 satellite has started transmitting E5 navigation signals. E5 is an alternative binary offset carrier: AltBOC(15,10), multiplexing 4 channels in two adjacent sidebands, E5a and E5b: two data channels and two pilot channels. Each sideband can be separately demodulated as a QPSK-like signal. Using a flexible experimental Er1/E5b COTS front end, with this set-up they separately received each sideband, with IF samples transferred for real-time processing, and stored for post-processing. Signals were acquired and tracked for multiple satellite passes of all four satellites. In an analysis of the E5b signals, both data and pilot channels, they found estimated C/N0 values to be consistent with the satellite elevation patterns.

The PFM and FM2 signals were received at approximately 3 db stronger than the GIOVE A and B signals. The team further found the presence of secondary code chips and navigation symbols on the data channels. Their future activities include checking the G/NAV data pages transmitted on the E5a band, and setup of a wideband experimental front-end for coherent for E5 processing.

You can find the full article here.