Interference-Aware Swap Matching for Full-Band MU-MIMO-OFDM User Scheduling under Channel Aging

This paper proposes a user-scheduling framework for full-band multi-cell MU-MIMO-OFDM downlink systems. Each base station schedules users over a common 100 MHz carrier, while spatial separation is achieved through regularized zero-forcing precoding. The scheduling problem is coupled across cells due to inter-cell interference. We formulate it as a many-to-one matching game with externalities and propose an interference-aware swap-matching algorithm with a mixed throughput/proportional-fair potential. The potential uses an aging-aware rate predictor based on temporal channel correlation. We prove finite convergence to a two-exchange-stable matching and evaluate the proposed method against baseline schemes under channel aging.