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Increased Multiplexing Gain with Reconfigurable Surfaces : Simultaneous Channel Orthogonalization and Information Embedding

Alegría, Juan Vidal LU orcid ; Vieira, Joao LU and Rusek, Fredrik LU (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.

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Please use this url to cite or link to this publication:
author
; and
organization
publishing date
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}},
}