TY - JOUR
T1 - Digital RIS (DRIS)
T2 - the future of digital beam management in RIS-assisted OWC systems
AU - Ndjiongue, Alain R.
AU - Ngatched, Telex M.N.
AU - Dobre, Octavia A.
AU - Haas, Harald
N1 - © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
PY - 2022/8/15
Y1 - 2022/8/15
N2 - Reconfigurable intelligent surfaces (RIS) have been recently introduced to optical wireless communication (OWC) networks to resolve skip areas and improve the signal-to-noise ratio at the user's end. In OWC networks, RIS are based on mirrors or metasurfaces. Metasurfaces have evolved significantly over the last few years. As a result, coding, digital, programmable, and information metamaterials have been developed. The advantage of these materials is that they can enable digital signal processing (DSP) techniques. For the first time, this paper proposes the use of digital RIS (DRIS) in OWC systems. We discuss the concept of DRIS and the application of DSP methods to the physical material. In addition, we examine metamaterials for optical DRIS with liquid crystals serving as the front row material. Finally, we present a design example and discuss future research directions.
AB - Reconfigurable intelligent surfaces (RIS) have been recently introduced to optical wireless communication (OWC) networks to resolve skip areas and improve the signal-to-noise ratio at the user's end. In OWC networks, RIS are based on mirrors or metasurfaces. Metasurfaces have evolved significantly over the last few years. As a result, coding, digital, programmable, and information metamaterials have been developed. The advantage of these materials is that they can enable digital signal processing (DSP) techniques. For the first time, this paper proposes the use of digital RIS (DRIS) in OWC systems. We discuss the concept of DRIS and the application of DSP methods to the physical material. In addition, we examine metamaterials for optical DRIS with liquid crystals serving as the front row material. Finally, we present a design example and discuss future research directions.
KW - array signal processing
KW - digital signal processing
KW - encoding
KW - metamaterials
KW - metasurfaces
KW - optical transmitters
KW - reconfigurable intelligent surfaces (RIS)
KW - reflection
KW - coding metamaterials
KW - digital RIS (DRIS)
KW - digital metamaterials
KW - information metamaterials
KW - programmable metamaterials
UR - https://doi.org/10.48550/arXiv.2112.09984
U2 - 10.1109/jlt.2022.3176762
DO - 10.1109/jlt.2022.3176762
M3 - Article
SN - 0733-8724
VL - 40
SP - 5597
EP - 5604
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 16
ER -