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arXiv · 2504.10705

Multi-Stream Transmission in Cell-Free MIMO Networks with Coherent AP Clustering

Esra Aycan Beyazıt·Jeroen Famaey·Nina Slamnik-Kriještorac·Johann M. Marquez-Barja·Miguel Camelo Botero
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Abstract

This letter proposes a multi-stream selection framework for \ac{CF-MIMO} networks. Partially coherent transmission has been considered by clustering \acp{AP} into phase-aligned clusters to address the challenges of phase misalignment and inter-cluster interference. A novel stream selection algorithm is developed to dynamically allocate multiple streams to each multi-antenna \ac{UE}, ensuring that the system optimizes the sum rate while minimizing inter-cluster and inter-stream interference. Numerical results validate the effectiveness of the proposed method in enhancing spectral efficiency and fairness in distributed \ac{CF-MIMO} networks.

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Esra Aycan Beyazıt, Jeroen Famaey, Nina Slamnik-Kriještorac, Johann M. Marquez-Barja, Miguel Camelo Botero. 2025-04-14. Multi-Stream Transmission in Cell-Free MIMO Networks with Coherent AP Clustering. https://doi.org/10.1109/lwc.2025.3576874

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