Fine-tuning a pre-trained GNN-based precoder on real D-MIMO CSI data from the Techtile testbed yields a 15.7% gain in multi-user scenarios and near-MRT performance in single-user cases with under 0.7 bits/channel use degradation on unseen positions.
On the Road to 6G: Visions, Requirements, Key Technologies, and Testbeds
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Testbed Evaluation of AI-based Precoding in Distributed MIMO Systems
Fine-tuning a pre-trained GNN-based precoder on real D-MIMO CSI data from the Techtile testbed yields a 15.7% gain in multi-user scenarios and near-MRT performance in single-user cases with under 0.7 bits/channel use degradation on unseen positions.