Decentralized multicell coordinated beamforming with overlapped clusters

This paper studies downlink coordinated beamforming schemes with overlapped clusters, where a base station (BS) may belong to multiple clusters selected by different users. Subject to the inherent constraint on information sharing for overlapped clusters, i.e., the information of a user is shared only within the user's coordinating cluster, we propose two decentralized coordinated beamforming schemes, which can be implemented at every BS individually without the iterations between multiple BSs. Simulation results demonstrate the performance gain of the proposed schemes over existing distributed schemes.