TY - GEN
T1 - Low Complexity Optimization for Line-of-Sight RIS-Aided Holographic Communications
AU - Ruiz-Sicilia, Juan Carlos
AU - Di Renzo, Marco
AU - Debbah, Merouane
AU - Poor, H. Vincent
N1 - Publisher Copyright:
© 2023 European Signal Processing Conference, EUSIPCO. All rights reserved.
PY - 2023
Y1 - 2023
N2 - The synergy of metasurface-based holographic surfaces (HoloS) and reconfigurable intelligent surfaces (RIS) is considered a key aspect for future communication networks. However, the optimization of dynamic metasurfaces requires the use of numerical algorithms, for example, based on the singular value decomposition (SVD) and gradient descent methods, which are usually computationally intensive, especially when the number of elements is large. In this paper, we analyze low complexity designs for RIS-aided HoloS communication systems, in which the configurations of the HoloS transmitter and the RIS are given in a closed-form expression. We consider implementations based on diagonal and non-diagonal RISs. Over line-of-sight channels, we show that the proposed schemes provide performance that is close to that offered by complex numerical methods.
AB - The synergy of metasurface-based holographic surfaces (HoloS) and reconfigurable intelligent surfaces (RIS) is considered a key aspect for future communication networks. However, the optimization of dynamic metasurfaces requires the use of numerical algorithms, for example, based on the singular value decomposition (SVD) and gradient descent methods, which are usually computationally intensive, especially when the number of elements is large. In this paper, we analyze low complexity designs for RIS-aided HoloS communication systems, in which the configurations of the HoloS transmitter and the RIS are given in a closed-form expression. We consider implementations based on diagonal and non-diagonal RISs. Over line-of-sight channels, we show that the proposed schemes provide performance that is close to that offered by complex numerical methods.
KW - degrees of freedom
KW - holographic multiple-antenna systems
KW - Reconfigurable intelligent surfaces
UR - https://www.scopus.com/pages/publications/85178360349
U2 - 10.23919/EUSIPCO58844.2023.10289802
DO - 10.23919/EUSIPCO58844.2023.10289802
M3 - Conference contribution
AN - SCOPUS:85178360349
T3 - European Signal Processing Conference
SP - 900
EP - 904
BT - 31st European Signal Processing Conference, EUSIPCO 2023 - Proceedings
T2 - 31st European Signal Processing Conference, EUSIPCO 2023
Y2 - 4 September 2023 through 8 September 2023
ER -