Rayleigh Fading Modeling and Channel Hardening for Reconfigurable Intelligent Surfaces

Emil Björnson; Luca Sanguinetti

doi:10.1109/LWC.2020.3046107

Rayleigh Fading Modeling and Channel Hardening for Reconfigurable Intelligent Surfaces

Information Theory 2021-01-05 v2 Signal Processing math.IT

Authors: Emil Björnson , Luca Sanguinetti

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Abstract

A realistic performance assessment of any wireless technology requires the use of a channel model that reflects its main characteristics. The independent and identically distributed Rayleigh fading channel model has been (and still is) the basis of most theoretical research on multiple antenna technologies in scattering environments. This letter shows that such a model is not physically appearing when using a reconfigurable intelligent surface (RIS) with rectangular geometry and provides an alternative physically feasible Rayleigh fading model that can be used as a baseline when evaluating RIS-aided communications. The model is used to revisit the basic RIS properties, e.g., the rank of spatial correlation matrices and channel hardening.

Keywords

rayleigh fading reconfigurable intelligent surface channel modeling channel hardening spatial correlation ris-aided communications

Cite

@article{arxiv.2009.04723,
  title  = {Rayleigh Fading Modeling and Channel Hardening for Reconfigurable Intelligent Surfaces},
  author = {Emil Björnson and Luca Sanguinetti},
  journal= {arXiv preprint arXiv:2009.04723},
  year   = {2021}
}

Comments

Published in IEEE Wireless Communications Letters, 6 pages, 4 figures

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