International Workshop on RIS - Feb, 22&23, 2024 - Talk by Philipp DEL HOUGNE (CNRS Rennes, France)

"Physics Compliant Modeling & Estimation of RIS Parametrized Wireless Channels"
Astract
In this talk, Dr. Del Hougne will discuss two equivalent approaches to physics-compliant modelling of RIS-parametrized wireless channels in non-trivial radio environments (i.e., involving scattering objects): a polarizability-based approach and a load-impedance-based approach. He will discuss how the parameters of these approaches can be estimated in any given but unknown experimental setting, revealing that physics-compliant channel estimation can be extremely frugal in terms of the number of required measurements, but also because it does not require phase measurements. Finally, he will present the first experimental demonstration of physical-model-based wave control in complex RIS-parametrized radio environments.
[1] R. Faqiri, C. Saigre-Tardif, G. C. Alexandropoulos, N. Shlezinger, M. F. Imani, and P. del Hougne, “PhysFad: Physics-Based End-to-End Channel Modeling of RIS-Parametrized Environments With Adjustable Fading,” IEEE Trans. Wirel. Commun., vol. 22, no. 1, pp. 580-595, Jan. 2023.
[2] H. Prod’homme and P. del Hougne, “Efficient Computation of Physics-Compliant Channel Realizations for (Rich-Scattering) RIS-Parametrized Radio Environments,” IEEE Commun. Lett., vol. 27, no. 12, pp. 3375-3379, Dec. 2023.
[3] J. Sol, H. Prod’homme, L. L. Magoarou, and P. del Hougne, “Experimentally realized physical-model-based wave control in metasurface-programmable complex media,” arXiv:2308.02349, Jul. 2023.
[4] J. Tapie, H. Prod’homme, M. F. Imani, and P. del Hougne, “Systematic Physics-Compliant Analysis of Over-the-Air Channel Equalization in RIS-Parametrized Wireless Networks-on-Chip.” arXiv, Oct. 2023.
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Reconfigurable Intelligent Surfaces are very promising physical-layer candidates for sixth-generation cellular networks.
This international workshop will cover the main scientific and technological questions underlying this promise: electromagnetism, meta-materials, beamforming, adaptive control, network architecture, and network energy expenditure.
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