Abstract:
The combination of reconfigurable intelligent surfaces (RISs) and extremely massive antenna arrays is lately gaining increased attention as a new wireless networking para...Show MoreMetadata
Abstract:
The combination of reconfigurable intelligent surfaces (RISs) and extremely massive antenna arrays is lately gaining increased attention as a new wireless networking paradigm, offering programmable radio wave propagation and holographic communications. However, the channel models used to date for the design and analysis of RIS-empowered multiple-input and multiple-output (MIMO) communication systems include fading in a manner that is unfaithful to the underlying wave physics. In this paper, we introduce a physics-based end-to-end model of RIS-parametrized MIMO channels of arbitrary dimensions with adjustable fading (named PhysFad), which is based on a first-principles coupled-dipole formalism. PhysFad naturally incorporates the notions of space, causality, frequency selectivity, and the intertwinement of phase and amplitude response of each RIS and antenna element, as well as any arising mutual coupling effects including long-range mesoscopic correlations. The presented channel model, whose code is shared openly, is used to implement Ricean fading conditions with various K factors in a physics-compliant manner.
Published in: 2022 IEEE Globecom Workshops (GC Wkshps)
Date of Conference: 04-08 December 2022
Date Added to IEEE Xplore: 12 January 2023
ISBN Information: