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Reconfigurable Intelligent Surfaces (RIS) constitute a promising technologythat could fulfill the extreme performance and capacity needs of the upcoming6G wireless networks, by offering software-defined control over wirelesspropagation phenomena. Despite the existence of many theoretical modelsdescribing various aspects of RIS from the signal processing perspective (e.g.,channel fading models), there is no open platform to simulate and study theiractual physical-layer behavior, especially in the multi-RIS case. In thispaper, we develop an open simulation platform, aimed at modeling thephysical-layer electromagnetic coupling and propagation between RIS pairs. Wepresent the platform by initially designing a basic unit cell, and thenproceeding to progressively model and simulate multiple and larger RISs. Theplatform can be used for producing verifiable stochastic models for wirelesscommunication in multi-RIS deployments, such as vehicle-to-everything (V2X)communications in autonomous vehicles and cybersecurity schemes, while its codeis freely available to the public.

An Open Platform for Simulating the Physical Layer of 6G Communication Systems with Multiple Intelligent Surfaces