A Simple Design of IRS-NOMA Transmission
A Simple Design of IRS-NOMA Transmission
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DOI：
10.1109/lcomm.2020.2974196
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发表时间：
2020-05-01
期刊：
影响因子：
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通讯作者：
Vincent Poor, H.
中科院分区：
文献类型：
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作者：
Ding, Zhiguo;Vincent Poor, H.
本文提出了一种简单的智能反射面（IRS）辅助非正交多址（NOMA）下行链路传输设计。具体地，首先在基站处使用传统的空分多址（SDMA），以通过使用附近用户的信道的空间方向来生成正交波束。然后，IRS辅助的NOMA用于通过将小区边缘用户的有效信道向量与预定空间方向对准来确保附加小区边缘用户也可以在这些波束上被服务。分析和仿真结果证明了所提出的IRS-NOMA方案的性能，并研究了硬件损伤对IRS-NOMA的影响。
This letter proposes a simple design of intelligent reflecting surface (IRS) assisted non-orthogonal multiple access (NOMA) downlink transmission. In particular, conventional spatial division multiple access (SDMA) is used first at the base station to generate orthogonal beams by using the spatial directions of the near users' channels. Then, IRS-assisted NOMA is used to ensure that additional cell-edge users can also be served on these beams by aligning the cell-edge users' effective channel vectors with the predetermined spatial directions. Both analytical and simulation results are provided to demonstrate the performance of the proposed IRS-NOMA scheme and also study the impact of hardware impairments on IRS-NOMA.