Geometry-Aware Regularization for Deep-Unfolded MIMO-OTFS Detection

Mon, 24 Aug 2026 00:00:00 +0000

Key Contributions

Gram matrix analysis: Analytical characterization of the non-uniform diagonal structure of the MIMO-OTFS Gram matrix, proving that all diagonal variation arises exclusively from inter-path coupling.
Geometry-aware regularizer: A coordinate-wise regularizer embedded into a deep-unfolded Conjugate Gradient detector, with per-component weights learned in a data-driven manner.
Performance gains: The proposed detector outperforms low-complexity baselines and approaches heavier neural architectures at medium-to-high SNR, with improved robustness in high-mobility scenarios.