Interference Mitigation between Remote Base Stations

We studied remote interference stemming from atmospheric duct. Since the remote interference deteriorates the uplink reception of far-away base station in 5G NR mobile network, the need for remote interference mitigation arises. To handle this problem, we propose mitigating remote interference in the spatial domain with MIMO system. We apply interference alignment scheme to the remote interference problem and propose a scheme to steer the remote interference signal toward the null space of the uplink channel in the victim cell. Lastly, we verify the remote interference mitigation effect of proposed schemes through numerical results.