no code implementations • 2 Nov 2023 • Doğa Gürgünoğlu, Emil Björnson, Gábor Fodor
In this paper, we study a new kind of pilot contamination appearing in multi-operator reconfigurable intelligent surfaces (RIS) assisted networks, where multiple operators provide services to their respective served users.
no code implementations • 10 Jun 2023 • Doğa Gürgünoğlu, Emil Björnson, Gábor Fodor
In this paper, we study the impact of pilot contamination in a system where two operators serve their respective users with the assistance of two wide-band reconfigurable intelligent surfaces (RIS), each belonging to a single operator.
no code implementations • 1 Apr 2022 • Sebastian Fodor, Gábor Fodor, Doğa Gürgünoğlu, Miklós Telek
Our key insight is that to maximize the achievable SINR and the spectral efficiency of MU-MIMO systems, proper pilot spacing must be applied to control the impact of the aging channel and to tune the trade-off between pilot and data symbols.
no code implementations • 20 Nov 2020 • Doğa Gürgünoğlu, Berkan Dulek, Sinan Gezici
The optimal power adaptation problem is investigated for vector parameter estimation according to various Fisher information based optimality criteria.
