Increased Multiplexing Gain with Reconfigurable Surfaces : Simultaneous Channel Orthogonalization and Information Embedding
(2023) 2023 IEEE Global Communications Conference, GLOBECOM 2023 p.5714-5719- Abstract
Reconfigurable surface (RS) has been shown to be an effective solution for improving wireless communication links in general multi-user multiple-input multiple-output (MU-MIMO) setting. Current research efforts have been largely directed towards the study of reconfigurable intelligent surface (RIS), which corresponds to an RS made of passive reconfigurable elements with only phase shifting capabilities. RIS constitutes a cost- and energy- efficient solution for increased beamforming gain since it allows to generate constructive interference towards desired directions, e.g., towards a base station (BS). However, in many situations, multiplexing gain may have greater impact on the achievable transmission rates and number of simultaneously... (More)
Reconfigurable surface (RS) has been shown to be an effective solution for improving wireless communication links in general multi-user multiple-input multiple-output (MU-MIMO) setting. Current research efforts have been largely directed towards the study of reconfigurable intelligent surface (RIS), which corresponds to an RS made of passive reconfigurable elements with only phase shifting capabilities. RIS constitutes a cost- and energy- efficient solution for increased beamforming gain since it allows to generate constructive interference towards desired directions, e.g., towards a base station (BS). However, in many situations, multiplexing gain may have greater impact on the achievable transmission rates and number of simultaneously connected devices, while RIS has only been able to achieve minor improvements in this aspect. Recent work has proposed the use of alternative RS technologies, namely amplitude-reconfigurable intelligent surface (ARIS) and fully-reconfigurable intelligent surface (FRIS), to achieve perfect orthogonalization of MU-MIMO channels, thus allowing for maximum multiplexing gain at reduced complexity. In this work we consider the use of ARIS and FRIS for simultaneously orthogonalizing a MU-MIMO channel, while embedding extra information in the orthogonalized channel. We show that the resulting achievable rates allow for full exploitation of the degrees of freedom in a MU-MIMO system with excess of BS antennas.
(Less)
- author
- Alegría, Juan Vidal LU ; Vieira, Joao LU and Rusek, Fredrik LU
- organization
- publishing date
- 2023
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Amplitude-reconfigurable intelligent surface (ARIS), channel orthogonalization, Fully-reconfigurable intelligent surface (FRIS), MU-MIMO, Reconfigurable surface (RS), symbiotic radio
- host publication
- GLOBECOM 2023 - 2023 IEEE Global Communications Conference
- pages
- 6 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- 2023 IEEE Global Communications Conference, GLOBECOM 2023
- conference location
- Kuala Lumpur, Malaysia
- conference dates
- 2023-12-04 - 2023-12-08
- external identifiers
-
- scopus:85187366560
- ISBN
- 9798350310900
- DOI
- 10.1109/GLOBECOM54140.2023.10437638
- language
- English
- LU publication?
- yes
- id
- 12342b69-87a3-45d2-b631-1d747c076ea4
- date added to LUP
- 2024-04-09 14:47:08
- date last changed
- 2024-04-09 14:48:19
@inproceedings{12342b69-87a3-45d2-b631-1d747c076ea4, abstract = {{<p>Reconfigurable surface (RS) has been shown to be an effective solution for improving wireless communication links in general multi-user multiple-input multiple-output (MU-MIMO) setting. Current research efforts have been largely directed towards the study of reconfigurable intelligent surface (RIS), which corresponds to an RS made of passive reconfigurable elements with only phase shifting capabilities. RIS constitutes a cost- and energy- efficient solution for increased beamforming gain since it allows to generate constructive interference towards desired directions, e.g., towards a base station (BS). However, in many situations, multiplexing gain may have greater impact on the achievable transmission rates and number of simultaneously connected devices, while RIS has only been able to achieve minor improvements in this aspect. Recent work has proposed the use of alternative RS technologies, namely amplitude-reconfigurable intelligent surface (ARIS) and fully-reconfigurable intelligent surface (FRIS), to achieve perfect orthogonalization of MU-MIMO channels, thus allowing for maximum multiplexing gain at reduced complexity. In this work we consider the use of ARIS and FRIS for simultaneously orthogonalizing a MU-MIMO channel, while embedding extra information in the orthogonalized channel. We show that the resulting achievable rates allow for full exploitation of the degrees of freedom in a MU-MIMO system with excess of BS antennas.</p>}}, author = {{Alegría, Juan Vidal and Vieira, Joao and Rusek, Fredrik}}, booktitle = {{GLOBECOM 2023 - 2023 IEEE Global Communications Conference}}, isbn = {{9798350310900}}, keywords = {{Amplitude-reconfigurable intelligent surface (ARIS); channel orthogonalization; Fully-reconfigurable intelligent surface (FRIS); MU-MIMO; Reconfigurable surface (RS); symbiotic radio}}, language = {{eng}}, pages = {{5714--5719}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, title = {{Increased Multiplexing Gain with Reconfigurable Surfaces : Simultaneous Channel Orthogonalization and Information Embedding}}, url = {{http://dx.doi.org/10.1109/GLOBECOM54140.2023.10437638}}, doi = {{10.1109/GLOBECOM54140.2023.10437638}}, year = {{2023}}, }