This page is dedicated to publications related to DYNASAT project.

Location-assisted precoding in 5G LEO systems: architectures and performances by Alessandro Guidotti, Carla Amatetti, Fabrice Arnal, Baptiste Chamaillard, and Alessandro Vanelli-Coralli.

Satellite communication systems are a fundamental component in support of Europe’s ambition to deploy smart and sustainable networks and services for the success of its digital economy. To cope with the 5G and beyond ever increas- ing demand for larger throughput, aggressive frequency reuse schemes (i.e., full frequency reuse), with the implementation of precoding/beamforming to cope with the massive co-channel interference, are recognised as one of the key technologies. While the best performance can be obtained with the knowledge of the Channel State Information (CSI) at the transmitter, this also poses some technical challenges related to signalling and synchronisation. In this paper, we focus on precoding solutions that only needs the knowledge of the users’ positions at the transmitter side, namely the recently introduced Switchable Multi-Beam (MB) and Spatially Sampled MMSE (SS-MMSE) precoding. Compared to the vast majority of the studies in the literature, we take into account both the users’ and the satellite movement in a Low Earth Orbit (LEO) mega-constellation, also proposing two system architectures. The extensive numerical assessment provides a valuable insight on the performance of these two precoding schemes compared to the optimal MMSE solution.

Published in: EUCNC & 6G Summit 2022. 8-10 June, Grenoble, France

A System Simulator for 5G Non-Terrestrial Network Evaluations by Jani Puttonen, Lauri Sormunen, Henrik Martikainen, Sami Rantanen, Janne Kurjenniemi.

3rd Generation Partnership Project (3GPP) is working on the specifications related to the 5G satellite component, i.e., 5G Non-Terrestrial Networks (NTN). 5G NTN specifications can be used to build different spaceborne or airborne 5G systems. This article presents a 5G NTN extension to an open-source Network Simulator 3 (ns-3) and its 5G extension (5G LENA). The objective is to use the resulting System Level Simulator (SLS) in 3GPP standardization to evaluate different system concepts and parameterizations.

Published in: 2021 IEEE 22nd International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM)

The simulator presented in this paper is the baseline for the DYNASAT demonstration development (multi-connectivity and coordinated DSA). The full paper is available on request. Please send an email to [email protected]