Author

Alejandro González-Garrido

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Preprint Aug 2026

Beam scheduling policy for communications and PNT services from LEO satellites

Future low Earth orbit (LEO) constellations are expected to provide positioning, navigation, and timing (PNT) as a native service alongside broadband, removing the GNSS dependency inherited by 5G non-terrestrial networks. This is known in the literature as fused PNT. This paper asks how a multibeam satellites in a LEO...

Alejandro González-Garrido, F. Menzione, O. Picchi et al. · 0 citations

Open access Sep 2026

Enhancing 5G NTN VSAT RACH in GNSS-Denied Environments: A Multi-Step Single-Satellite AoA/FoA/ToA Positioning Using Levenberg–Marquardt Kalman Filtering

The 3GPP 5G Non-Terrestrial Network (NTN) technology fundamentally relies on a Global Navigation Satellite System (GNSS) fix at the User Equipment (UE) to pre-compensate for user-link delay and Doppler shifts prior to any transmission, including the random-access procedure for the initial access. In GNSS-denied or inte...

F. Menzione, Alejandro González-Garrido, Flavien Ronteix-Jacquet et al. · Italian National Conference... · 0 citations

Preprint Jul 2026

5G Positioning Reference Signal impact assessment in Non-Terrestrial Networks communication service

5G New Radio (NR) Non-Terrestrial Networks (NTNs) extend cellular connectivity through Low Earth Orbit (LEO) and Medium Earth Orbit (MEO) satellite constellations while enabling the reuse of downlink NR Positioning Reference Signals (PRS) to provide Positioning, Navigation, and Timing (PNT) services alongside broadband...

Alejandro González-Garrido, Ottavio M.Picchi, F. Menzione · 1 citation · ⚡1