Publication detail

A Time-Domain Model of Reconfigurable Intelligent Surfaces Through the Fast Inversion of the Laplace Transform

LORETO, F. PETTANICE, G. VALENTINI, R. DI MARCO, P. ROMANO, D. ŠTUMPF, M. SANTUCCI, F. ANTONINI, G.

Original Title

A Time-Domain Model of Reconfigurable Intelligent Surfaces Through the Fast Inversion of the Laplace Transform

Type

conference paper

Language

English

Original Abstract

The Reconfigurable Intelligent Surface (RIS) technology has gained a growing interest in both academia and industry given its capability to provide more flexible and controllable wireless propagation channels. RISs typically consist of inexpensive scattering elements (i.e., unit cells), which are spaced at sub-wavelength distances, and their characterization is mainly performed in the frequency domain. The aim of this work is to present a novel time-domain modeling approach for RISs, which is based on an inverse Laplace transform and allows to overcome some of the limitations of direct time domain analyses. In particular, since propagation delays between transmitters, RIS, and receivers are important and need to be accurately reproduced, a dedicated version of the Fast Inversion of the Laplace Transform (FILT) is presented and is found to guarantee accurate time-domain representation, while preserving the causality of the system response. In contrast to conventional time-stepping methods, the presented modeling technique is stable and allows to calculate the system response in a bounded time window within which the interaction takes place, thereby reducing the computational burden. Finally, the aforementioned claims are supported and validated by extensive numerical simulations and tests.

Keywords

reconfigurable intelligent surface; time-domain analysis; Laplace transform

Authors

LORETO, F.; PETTANICE, G.; VALENTINI, R.; DI MARCO, P.; ROMANO, D.; ŠTUMPF, M.; SANTUCCI, F.; ANTONINI, G.

Released

10. 10. 2023

Publisher

IEEE EMC Society

Location

Krakow, Poland

ISBN

9798350324006

Book

Proceedings 2023 International Symposium on EMC Europe,

Pages count

5

URL

https://ieeexplore.ieee.org/document/10274380

BibTex

@inproceedings{BUT185672,
  author="LORETO, F. and PETTANICE, G. and VALENTINI, R. and DI MARCO, P. and ROMANO, D. and ŠTUMPF, M. and SANTUCCI, F. and ANTONINI, G.",
  title="A Time-Domain Model of Reconfigurable Intelligent Surfaces Through the Fast Inversion of the Laplace Transform",
  booktitle="Proceedings 2023 International Symposium on EMC Europe,",
  year="2023",
  pages="5",
  publisher="IEEE EMC Society",
  address="Krakow, Poland",
  doi="10.1109/EMCEurope57790.2023.10274380",
  isbn="9798350324006",
  url="https://ieeexplore.ieee.org/document/10274380"
}