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- W4285209098 abstract "Owing to the increasing demand of higher spectrum efficiency and large-scale connectivity, non-orthogonal multiple access (NOMA) has become a highly competitive candidate for the upcoming sixth-generation (6G) systems. Nevertheless, the instable wireless propagation environment and potential wireless security risk become bottlenecks in applications of NOMA. Fortunately, intelligent reflecting surface (IRS) that can construct the three-dimensional beamforming and reconfigure the channels emerges as a highly efficient technology to break through the limitations of NOMA. Thus, in this article, we first present an overview of NOMA, and particularly illustrate its main shortcomings and security risks. Then, we introduce the IRS technology and provide further enhancement by applying IRS to NOMA networks. In addition, typical security threats in IRS-NOMA networks are shown, followed by two countermeasures based on the joint transmit beamforming and IRS reflecting beamforming toward external and internal eavesdropping, respectively. Simulation results are carried out to demonstrate the feasibility and effectiveness of these two schemes. Several challenges and future directions are also discussed." @default.
- W4285209098 created "2022-07-14" @default.
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- W4285209098 date "2023-02-01" @default.
- W4285209098 modified "2023-09-28" @default.
- W4285209098 title "Secure Beamforming for IRS-Enhanced NOMA Networks" @default.
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- W4285209098 doi "https://doi.org/10.1109/mwc.012.2100639" @default.
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