In order to overcome the"Double fading"effect formed by two different multipath propagation of a signal in wireless communication systems and solve the problem of energy limitation of terminal equipment,a new active reconfigurable intelligent surface(ARIS)assisted simultaneous wireless informa-tion and power transfer(SWIPT)non-orthogonal multiple access(NOMA)communication system model was proposed.Considering each user's quality of service limitation,energy harvesting limitation and ARIS amplitude limitation,a joint optimization of ARIS phase shift matrix,base station transmit beam-forming and user-side power splitting ratio was established to minimize the total power consumption of the system.In order to solve this non-convex optimization problem with highly coupled variables,the original problem was decomposed into three sub-problems by the block coordinate descent method,and the sub-problems were transformed and solved by the semi-definite relaxation technique.Simulation re-sults showed that,compared with the traditional orthogonal multiple access and passive reconfigurable intelligent surface schemes,the proposed ARIS assisted SWIPT-NOMA scheme showed better perfor-mance in reducing the total power consumption of the system.
关键词
主动可重构智能表面/无线携能通信/非正交多址接入/半正定松弛/总功率最小化
Key words
active reconfigurable intelligent surface/simultaneous wireless information and power trans-fer/non-orthogonal multiple access/semidefinite relaxation/total power minimization
维普
万方数据