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09 October 2024 |
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Article overview
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Intelligent Omni-Surfaces: Reflection-Refraction Circuit Model, Full-Dimensional Beamforming, and System Implementation | | Shuhao Zeng
; Hongliang Zhang
; Boya Di
; Yuanwei Liu
; Marco Di Renzo
; Zhu Han
; H. Vincent Poor
; Lingyang Song
; | | Date: |
1 Jun 2022 | | Abstract: | The intelligent omni-surface (IOS) is a dynamic metasurface that has recently
been proposed to achieve full-dimensional communications by realizing the dual
function of anomalous reflection and anomalous refraction. Existing research
works provide only simplified models for the reflection and refraction
responses of the IOS, which do not explicitly depend on the physical structure
of the IOS and the angle of incidence of the electromagnetic (EM) wave.
Therefore, the available reflection-refraction models are insufficient to
characterize the performance of full-dimensional communications. In this paper,
we propose a complete and detailed circuit-based reflection-refraction model
for the IOS, which is formulated in terms of the physical structure and
equivalent circuits of the IOS elements, as well as we validate it against
full-wave EM simulations. Based on the proposed circuit-based model for the
IOS, we analyze the asymmetry between the reflection and transmission
coefficients. Moreover, the proposed circuit-based model is utilized for
optimizing the hybrid beamforming of IOS-assisted networks and hence improving
the system performance. To verify the circuit-based model, the theoretical
findings, and to evaluate the performance of full-dimensional beamforming, we
implement a prototype of IOS and deploy an IOS-assisted wireless communication
testbed to experimentally measure the beam patterns and to quantify the
achievable rate. The obtained experimental results validate the theoretical
findings and the accuracy of the proposed circuit-based reflection-refraction
model for IOSs. | | Source: | arXiv, 2206.00204 | | Services: | Forum | Review | PDF | Favorites | |
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