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SNR maximization in beyond diagonal RIS-assisted single and multiple antenna links

Abstract: Reconfigurable intelligent surface (RIS) architectures not limited to diagonal phase shift matrices have recently been considered to increase their flexibility in shaping the wireless channel. One of these beyond-diagonal RIS or BD-RIS architectures leads to a unitary and symmetric RIS matrix. In this letter, we consider the problem of maximizing the signal-to-noise ratio (SNR) in single and multiple antenna links assisted by a BD-RIS. The Max-SNR problem admits a closed-form solution based on the Takagi factorization of a certain complex and symmetric matrix. This allows us to solve the max-SNR problem for SISO, SIMO, and MISO channels.

 Autoría: Santamaria I., Soleymani M., Jorswieck E., Gutierrez J.,

 Fuente: IEEE Signal Processing Letters, 2023, 30, 923-926

Editorial: Institute of Electrical and Electronics Engineers Inc.

 Fecha de publicación: 19/07/2023

Nº de páginas: 4

Tipo de publicación: Artículo de Revista

 DOI: 10.1109/LSP.2023.3296902

ISSN: 1070-9908,1558-2361

Proyecto español: PID2019-104958RB-C43

Url de la publicación: https://doi.org/10.1109/LSP.2023.3296902

Autores/as

SOLEYMANI, MOHAMMAD

JORSWIECK, EDUARD

JESUS GUTIERREZ TERAN