Null-space flow matching decomposes MIMO CSI estimation into direct range-space reconstruction from noisy pilots and iterative FM-based null-space generation, achieving competitive NMSE under a ~3 ms latency budget with a power-law schedule and noise-aware correction.
Available: https://arxiv.org/abs/2512.08125
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Null-Space Flow Matching for MIMO Channel Estimation in Latency-Constrained Systems
Null-space flow matching decomposes MIMO CSI estimation into direct range-space reconstruction from noisy pilots and iterative FM-based null-space generation, achieving competitive NMSE under a ~3 ms latency budget with a power-law schedule and noise-aware correction.