Galileo, the European backed satellite positioning and timing system, broadcasts navigation messages in three bands, called E1, E5, E6. The signal structure selected for the E5 band is an AltBOC(15,10) and this is the most promising signal in terms of performance in multipath environments but also the most challenging for a receiver because of its wide bandwidth (51.150 MHz). In this paper the differences and the similarities will be shown between the conventional AltBOC signal structure and that proposed for Galileo E5 signal. It is calculated the exact autocorrelation function of the unfiltered signal and proposed a method for the generation of the samples of that signal useful for simulations or for software receivers. It will be shown that it is possible the acquisition of the wide-band overall signal only with a complex pilot signal by means of an FFT-based technique. It will also be presented the code discriminator of the AltBOC(15,10) signal, and a possible way for a joint demodulation of data signals. It is provided the bit error rate of the implemented system.

Analysis of Galileo AltBOC(15,10) Signal for Simulations and Software Receivers

VANGELISTA, LORENZO;PUPOLIN, SILVANO;
2007

Abstract

Galileo, the European backed satellite positioning and timing system, broadcasts navigation messages in three bands, called E1, E5, E6. The signal structure selected for the E5 band is an AltBOC(15,10) and this is the most promising signal in terms of performance in multipath environments but also the most challenging for a receiver because of its wide bandwidth (51.150 MHz). In this paper the differences and the similarities will be shown between the conventional AltBOC signal structure and that proposed for Galileo E5 signal. It is calculated the exact autocorrelation function of the unfiltered signal and proposed a method for the generation of the samples of that signal useful for simulations or for software receivers. It will be shown that it is possible the acquisition of the wide-band overall signal only with a complex pilot signal by means of an FFT-based technique. It will also be presented the code discriminator of the AltBOC(15,10) signal, and a possible way for a joint demodulation of data signals. It is provided the bit error rate of the implemented system.
2007
Proc. The 10-th International Symposium on Wireless Personal Multimedia Communications
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2445607
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