Adaptive 3D-RoPE: Physics-Aligned Positional Encoding for Wireless Foundation Models
A revised arXiv paper proposes Adaptive 3D-RoPE, a rotary positional encoding scheme designed to match the physical structure of wireless channel data. The method targets wireless foundation models used for unified channel state information (CSI) acquisition in 6G networks, where such models already outperform task-specific baselines. The authors argue that aligning positional encoding with physics improves how these models generalize across tasks.