Successive multi-cell beamforming with limited network coordination

Abstract

In this paper, we propose two successive multi-cell beamforming schemes for downlink multiple-input single-output (MISO) cellular networks. In the proposed multi-cell beamforming schemes, base stations (BSs) successively determine their beamforming vectors to effectively reduce the amount of sharing information and computational complexity. Our numerical results show that the proposed schemes provide reasonable BS coordination gains while they effectively reduce the amount of information shared between BSs and computational complexity. It is also shown that the optimized order of successive multi-cell beamforming can notably enhance BS coordination gains.