On the Ergodic Capacity for SIM-Aided Holographic MIMO Communications

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

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arXiv · 2512.22068

On the Ergodic Capacity for SIM-Aided Holographic MIMO Communications

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

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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.

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Anastasios Papazafeiropoulos, Ioannis Bartsiokas, Dimitra I. Kaklamani, Iakovos S. Venieris. 2025-12-26. On the Ergodic Capacity for SIM-Aided Holographic MIMO Communications. https://arxiv.org/abs/2512.22068

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