Worst-case robust multiuser transmit beamforming using semidefinite relaxation: duality and implications
Worst-case robust multiuser transmit beamforming using semidefinite relaxation: duality and implications
This paper studies a downlink multiuser transmit beamforming design under spherical channel uncertainties, using a worst-case robust formulation. This robust design problem is nonconvex. Recently, a convex approximation formulation based on semidefinite relaxation (SDR) has been proposed to handle the problem. Curiously, simulation results have consistently indicated that SDR can …