@article{10902/36945,
year = {2025},
month = {6},
url = {https://hdl.handle.net/10902/36945},
abstract = {In this letter, we derive an expression for the achievable rate in a multiple-input multiple-output (MIMO) system assisted by a beyond-diagonal reconfigurable intelligent surface (BD-RIS) when the channels to and from the BD-RIS are line-of-sight (LoS) while the direct link is non-line-of-sight (NLoS). The rate expression allows to derive the optimal unitary and symmetric scattering BD-RIS matrix in closed form. Our simulation results show that the proposed solution is competitive even under the more usual Ricean channel fading model when the direct link is weak.},
organization = {This work is supported by the European Commission’s Horizon Europe, Smart Networks and Services Joint Undertaking, research and innovation program under grant agreement 101139282, 6G-SENSES project. The work of I. Santamaria was also partly supported under grant PID2022-137099NB-C43 (MADDIE) funded by MICIU/AEI /10.13039/501100011033 and FEDER, UE.},
publisher = {Institute of Electrical and Electronics Engineers, Inc.},
publisher = {IEEE Communications Letters, 2025, 29(6), 1325 - 1329},
title = {Rate analysis and optimization of LoS beyond diagonal RIS-assisted MIMO systems},
author = {Santamaría Caballero, Luis Ignacio and Gutiérrez Terán, Jesús and Soleymani, Mohammad and Jorswieck, Eduard},
}