Cooperative 5G switched and adaptive receiver beamforming for fibre wireless networks

This paper introduces an eNodeB receiver beamforming technique to mitigate future 5G network uplink inter-cell interference. This technique is based on the concept of smart antennas, improving the uplink signal-to-interference noise ratio (SINR) of cell-edge User Equipment (UEs). Antenna adaptivity in the proposed technique is complemented by the presence of switched antenna beamforming applicable to selective cluster UEs saving on processing power at the eNodeB. The benefits of cooperative uplink receiver beamforming can be enhanced in fibre-wireless (FiWi) networks with centralization due to a better knowledge of UE position and resource allocation. System level simulations of a complete cellular network have demonstrated significant improvement in the presence of switched and adaptive beamforming with respect to throughput and SINR.