Block Diagonalization with Multiuser Beamforming for Coordinated Multi-Point Transmission

Coordinated Multi-Point transmission and reception (CoMP) technique is mostly required to reduce the inter-cell interference (ICI). It also increases the cell edge user throughput and improves the coverage. We apply block diagonal beamforming to downlink transmission, and assume perfect knowledge of downlink channels and transmit messages at each transmit point. Two different power allocation schemes are investigated for SVD, ZF and BD based multicell transmission.The SVD scheme achieves a suboptimal performance, butat a reduced complexity.In this paper, we study the performance of multiuser beamforming for differently in various CoMP scenarios. The simulations results indicate that the proposed scheme offers much higher performance gain compared with the CoMP-JP mode and reduce the complexity in comparison with BD scheme.