Regularized Approximate Message Passing for Overloaded Discrete Linear Inversion

Collection of new arXiv papers (Apr 7, 2026) on wireless communications and sensing. Key contributions include: RAMP (Regularized Approximate Message Passing) for overloaded discrete MIMO that enforces discrete constellations within AMP and reduces per-iteration complexity from O(M^3) to O(NM) with an L2-regularized robust variant; a measurement-driven birth model for GLMB filtering; an LLM-based, physics-aware CSI predictor for high-mobility OTFS that incorporates mobility descriptors to improve NMSE; joint orchestration methods for O-RAN cell-free massive MIMO with wireless fronthaul that (a