A Coordinated Beamforming Algorithm of Resource Efficiency Maximization for the Multicell downlink System

In this paper, we investigate the design of the multicell multiuser coordinated beamforming algorithm for the optimization of the resource efficiency. In order to balance the spectral efficiency and the energy efficiency, we consider the design of algorithm that is used to solve optimization problem of the resource efficiency, a weighted sum optimization problem of the system energy efficiency and the normalized system sum rate subject to per-cell transmit power constraint and some given per-user quality of service. The optimization problem of interest is non-convex due to the coupling between the optimization variables and the non-convex constraints and therefore is difficult to solve. An alternative optimization solver is developed to address the resource efficiency optimization problem by using jointly the convex approximation method and the fractional theory. The convergence of the proposed algorithm is guaranteed with the convex approximation method and the monotonic boundary theory. At the same time, extensive numerical simulations validate the effectiveness of the proposed algorithm.