ARIS辅助SWIPT-NOMA系统的性能  

Performance of ARIS assisted SWIPT-NOMA system

作　　者：杨莎 唐菁敏[1] 宋耀莲[1] 虞贵财 YANG Sha;TANG Jing-min;SONG Yao-lian;YU Gui-cai(School of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650504,China;College of Physical Science and Information,Yichun University,Yichun 336000,Jiangxi,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650504 [2]宜春学院物理科学与工程技术学院,江西宜春336000

出　　处：《兰州大学学报（自然科学版）》2024年第6期782-789,共8页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(62261056);江西省自然科学基金项目(20212BAB202029)。

摘　　要：为克服无线通信系统中信号经两次不同的多径传播形成的“双衰落”效应,解决终端设备的能量受限等问题,提出一种主动可重构智能表面(ARIS)辅助无线携能通信(SWIPT)非正交多址(NOMA)通信系统模型.考虑每个用户的服务质量限制、能量收集限制和ARIS幅度限制,建立联合优化ARIS相移矩阵、基站发射波束成形和用户侧功率分割比,以实现系统总功率的最小化.为解决此非凸且具有高度耦合变量的优化问题,利用块坐标下降法将其分解为3个子问题,用半正定松弛技术对子问题进行转换求解.仿真结果表明,与传统正交多址和被动可重构智能表面方案相比,ARIS辅助SWIPT-NOMA方案在降低系统总功率方面表现出更好的性能.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 information 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 beamforming 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 results showed that,compared with the traditional orthogonal multiple access and passive reconfigurable intelligent surface schemes,the proposed ARIS assisted SWIPT-NOMA scheme showed better performance 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 

分 类 号：TN929.5[电子电信—通信与信息系统]