A diffusion model with an element-wise time matrix, rather than one global time, improves MIMO-OFDM channel recovery from unevenly reliable pilots, but the proof of correctness has gaps.
RF-Diffusion: Radio signal generation via time-frequency diffusion,
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Non-Identical Diffusion Models in MIMO-OFDM Channel Generation
A diffusion model with an element-wise time matrix, rather than one global time, improves MIMO-OFDM channel recovery from unevenly reliable pilots, but the proof of correctness has gaps.