论文标题
IRS-NOMA网络的节能设计
Energy-Efficient Design of IRS-NOMA Networks
论文作者
论文摘要
结合智能反射表面（IRS）和非正交多重访问（NOMA）是提高通信覆盖范围和能源效率的有效解决方案。在本文中，我们专注于IRS辅助的NOMA网络，并提出一种节能算法，以在总和最大化和总功耗最小化之间进行良好的权衡。我们的目标是通过共同优化BS的发射光束和IRS的反射光束形成来最大化系统能效。具体而言，IRS上低成本无源元件的发射光束形成和相位被优化直至收敛。仿真结果表明，与常规的OMA-IRS和NOMA相比，IRS-NOMA中提出的算法可以产生较高的性能。
Combining intelligent reflecting surface (IRS) and non-orthogonal multiple access (NOMA) is an effective solution to enhance communication coverage and energy efficiency. In this paper, we focus on an IRS-assisted NOMA network and propose an energy-efficient algorithm to yield a good tradeoff between the sum-rate maximization and total power consumption minimization. We aim to maximize the system energy efficiency by jointly optimizing the transmit beamforming at the BS and the reflecting beamforming at the IRS. Specifically, the transmit beamforming and the phases of the low-cost passive elements on the IRS are alternatively optimized until the convergence. Simulation results demonstrate that the proposed algorithm in IRS-NOMA can yield superior performance compared with the conventional OMA-IRS and NOMA with a random phase IRS.
