Downlink beamforming for other-cell interference mitigation in correlated MISO channels

Abstract

In this paper, we consider a multi-antenna technique that can mitigate other cell interference (OCI) in correlated multiple-input single-output (MISO) cellular environments. By exploiting the spatial channel information with adjacent cells, the proposed scheme generates a beamforming weight that yields less interference to other users in the adjacent cells, while increasing the signal power to the target user. To reduce the implementation complexity, we consider the sharing of channel information with a minimum number of adjacent cells. Finally, the performance of the proposed scheme is verified by computer simulation. The simulation results show that the proposed scheme provides noticeable performance improvement particularly in high spatial correlation environments.