Work

Optimization of Active Reconfigurable Surfaces for Spatiotemporal MU-MIMO Wave Routing in Disordered Media: Application to the Cocktail-Party Problem

Year: 2026

Type: preprint

Abstract: We design an active reconfigurable intelligent surface (RIS) for acoustic multi-user multiple-input multiple-output (MU-MIMO) communication by solving a large-scale convex optimization problem, so that each emitter's broadband signal focuses in space and time at its intended receivers while crosstalk is suppressed. In acoustic experiments, we show that our approach outperforms existing time-reversal methods by 5.1-7.6 dB in crosstalk suppression, while achieving better temporal focusing.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.14328

Authors: Jorgensen, Frederic J. N., Dorlot, Florent, Bourdeloux, Constant, Fink, Mathias, Lemoult, Fabrice, Johnson, Steven G., Pestourie, Raphaël

Institutions: Massachusetts Institute of Technology, Centre National de la Recherche Scientifique, Université Paris Sciences et Lettres, Institut Langevin, ESPCI Paris, Georgia Institute of Technology

Language: English

Topic: Advanced Wireless Communication Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Agence Nationale de la Recherche, National Institutes of Health, Army Research Office

Awards: G1459921489, A new generation of interacting resonators: non-Hermitian and time modulated coupling, ACED: Redefining the Design of Mechanical Metamaterials via Generative Models

OpenAlex ID: W7221793634

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