On the Ergodic Capacity for SIM-Aided Holographic MIMO Communications

Anastasios Papazafeiropoulos; Ioannis Bartsiokas; Dimitra I. Kaklamani; Iakovos S. Venieris

doi:10.1109/LWC.2025.3649381

On the Ergodic Capacity for SIM-Aided Holographic MIMO Communications

Anastasios Papazafeiropoulos
, Ioannis Bartsiokas
, Dimitra I. Kaklamani
, Iakovos S. Venieris

University of Hertfordshire

Research output: Contribution to journal › Article › peer-review

Abstract

We derive a novel closed-form lower bound on the ergodic capacity of holographic multiple-input multiple-output (HMIMO) systems enhanced by stacked intelligent metasurfaces (SIMs) under Rayleigh fading conditions. The proposed expression is valid for systems with a finite number of antennas and SIM elements and exhibits tightness throughout the whole signal-to-noise ratio (SNR) range. Furthermore, we conduct a comprehensive low-SNR analysis, offering meaningful observations on how key system parameters influence the capacity performance.

Original language	English
Pages (from-to)	1120-1124
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	15
DOIs	https://doi.org/10.1109/LWC.2025.3649381
Publication status	Published - 2026

Keywords

6G networks
Holographic MIMO (HMIMO)
stacked intelligent metasurfaces (SIMs)

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10.1109/LWC.2025.3649381

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abstract = "We derive a novel closed-form lower bound on the ergodic capacity of holographic multiple-input multiple-output (HMIMO) systems enhanced by stacked intelligent metasurfaces (SIMs) under Rayleigh fading conditions. The proposed expression is valid for systems with a finite number of antennas and SIM elements and exhibits tightness throughout the whole signal-to-noise ratio (SNR) range. Furthermore, we conduct a comprehensive low-SNR analysis, offering meaningful observations on how key system parameters influence the capacity performance.",

keywords = "6G networks, Holographic MIMO (HMIMO), stacked intelligent metasurfaces (SIMs)",

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AU - Papazafeiropoulos, Anastasios

AU - Bartsiokas, Ioannis

AU - Kaklamani, Dimitra I.

AU - Venieris, Iakovos S.

PY - 2026

Y1 - 2026

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AB - We derive a novel closed-form lower bound on the ergodic capacity of holographic multiple-input multiple-output (HMIMO) systems enhanced by stacked intelligent metasurfaces (SIMs) under Rayleigh fading conditions. The proposed expression is valid for systems with a finite number of antennas and SIM elements and exhibits tightness throughout the whole signal-to-noise ratio (SNR) range. Furthermore, we conduct a comprehensive low-SNR analysis, offering meaningful observations on how key system parameters influence the capacity performance.

KW - 6G networks

KW - Holographic MIMO (HMIMO)

KW - stacked intelligent metasurfaces (SIMs)

UR - https://www.scopus.com/pages/publications/105026266674

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SP - 1120

EP - 1124

JO - IEEE Wireless Communications Letters

JF - IEEE Wireless Communications Letters

ER -

On the Ergodic Capacity for SIM-Aided Holographic MIMO Communications

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Keywords

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