Joint beamforming and power control for auction-based spectrum allocation in CoMP systems

Abstract

It has been well recognized that coordinated multi-point transmission (CoMP) is a promising technique to achieve high spectral efficiency. However, few works have considered the system utility maximization problem for spectrum allocation in CoMP systems. Motivated by optimizing the system utility, we combine auction theory with joint beamforming and power control techniques for spectrum allocation in CoMP systems. Since the system utility maximization problem can be formulated as a non-cooperative game, Nash equilibrium is considered as the solution of this game. Meanwhile, a joint beamforming and power control algorithm (JBPCA) is proposed to optimize the system utility. Simulation results show the effectiveness and convergence behavior of the proposed algorithm while adjusting a locally optimal pair of transmission power vector and beamforming vector.