Faculty of Science, Technology and Medicine
Faculty of Law, Economics and Finance
Faculty of Humanities, Education and Social Sciences
Interdisciplinary Centre for Security, Reliability and Trust
Luxembourg Centre for Systems Biomedicine
Luxembourg Centre for Contemporary and Digital History
Luxembourg Centre for European Law
Luxembourg Centre for Socio-Environmental Systems
The Doctoral School in Science and Engineering is happy to invite you to Carlos Luis MARCOS ROJAS’s defence entitled
Combining Techniques for the Reception of Signals from Satellite Constellations with Path Diversity at the User Terminals
Supervisor: Dr. Juan Carlos MERLANO DUNCAN
The large-scale deployment of non‑terrestrial networks (NTNs) based on non‑geostationary orbit (NGSO) satellite constellations is transforming the design paradigm of satellite communication systems. The availability of multiple simultaneously visible satellites at the user terminal (UT) enables the exploitation of spatial diversity through cooperative transmission. However, practical realization of such techniques is severely constrained by symbol‑level time misalignment caused by differential propagation delays, satellite motion, and heterogeneous onboard clocks. These impairments fundamentally challenge the applicability of classical transmit‑diversity techniques, such as space–time block coding (STBC), which rely on strict synchronization assumptions that are rarely satisfied in realistic satellite environments.