Rayleigh Fading Modeling and Channel Hardening for Reconfigurable Intelligent Surfaces

By Emil Björnson, Luca Sanguinetti. IEEE Wireless Communications Letters, 2020

559 citations recorded by the source corpus.

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.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/0c6863c8f6d1324ecfc7ee7c715ff7267baa68d4

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In Electrical and Electronic Engineering

1. Linglong Dai
2. Chenxi Hu
3. Xiaoyun Wang
4. Shuangfeng Han
5. Zijian Zhang
6. Robert Schober

Citations in the corpus

• An Overview of Signal Processing Techniques for RIS/IRS-Aided Wireless Systems (2021, unknown): “The spatial covariance matrices can be estimated by using the method in [186] or the model proposed in [187].”
• Two-Timescale Channel Estimation for Reconfigurable Intelligent Surface Aided Wireless Communications (2019, background): “We assume uncorrelated Rayleigh fading channels [25], i.”
• Reconfigurable Intelligent Surfaces: A signal processing perspective with wireless applications (2021, unknown): “R 2 ! z The RIS geometry determines the steering vector, and a general way to compute it is found in [21].”