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Joint Transmitter and Receiver Beamforming for Maximum Capacity in Spatial Division Multiaccess

Antenna array beamforming and power control have been studied separately to increase the capacity in wireless communication networks. Recently, the two were considered jointly in a system with power control capabilities which uses antenna array at the receiver only or the transmitter only. In this paper we formulate and study the joint beamforming and power control problem in a system with antenna arrays both at the transmitter and the receiver. Two algorithms are proposed for the joint problem. The capacity of the system that has beamforming capabilities at both sides is compared with the system that has one side beamforming capabilities only. The increase in the network capacity is evaluated through a numerical study.