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

2025/04/14 by Beyazıt, Esra Aycan, Famaey, Jeroen, Slamnik-Kriještorac, Nina +2
#FOS: Electrical engineering #Signal Processing (eess.SP) #electronic engineering #information engineering

paper · doi:10.48550/arxiv.2504.10705

Abstract

This letter proposes a multi-stream selection framework for \acCF-MIMO networks. Partially coherent transmission has been considered by clustering \acpAP 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 \acUE, 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 \acCF-MIMO networks.

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