Author

Anastasios K. Papazafeiropoulos

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Open access Sep 2026

AI-Enabled Hierarchical Network Selection in Integrated 6G TN-NTN Architectures

Sixth-generation (6G) wireless systems target ubiquitous connectivity by integrating terrestrial network (TNs) and non-terrestrial network (NTN) cooperation, including low-Earth-orbit (LEO) satellites, high-altitude platform stations (HAPS), and unmanned aerial vehicles (UAVs). In such a vertically stratified architect...

Ioannis A. Bartsiokas, Maria-Lamprini A. Bartsioka, P. Gkonis et al. · Electronics · 0 citations

Open access Jul 2026

Performance Limits of RIS-Assisted MIMO Systems in Nakagami-m Fading Environments

This work analyzes the ergodic capacity behavior of reconfigurable intelligent surface (RIS)-assisted multiple-input multiple-output (MIMO) systems with a finite and arbitrary number of antennas and RIS elements under Nakagami-m fading conditions. By combining Hadamard’s determinant inequality with the Cauchy–Schwarz i...

Anastasios K. Papazafeiropoulos · Signals · 0 citations