Non-Orthogonal Multiple Access (NOMA) With Multiple Intelligent Reflecting Surfaces

@article{Cheng2021NonOrthogonalMA,
  title={Non-Orthogonal Multiple Access (NOMA) With Multiple Intelligent Reflecting Surfaces},
  author={Yanyu Cheng and Kwok Hung Li and Yuanwei Liu and Kah Chan Teh and George K. Karagiannidis},
  journal={IEEE Transactions on Wireless Communications},
  year={2021},
  volume={20},
  pages={7184-7195}
}
In this paper, non-orthogonal multiple access (NOMA) networks assisted by multiple intelligent reflecting surfaces (IRSs) with discrete phase shifts are investigated, in which each user device (UD) is served by an IRS to improve the quality of the received signal. Two scenarios are considered according to whether there is a direct link between the base station (BS) and each UD, and the outage performance is analyzed for each of them. Specifically, the asymptotic expressions for the upper and… 
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