Robust and Secure Communications in Intelligent Reflecting Surface Assisted NOMA Networks

  title={Robust and Secure Communications in Intelligent Reflecting Surface Assisted NOMA Networks},
  author={Zheng Zhang and Lu Lv and Qingqing Wu and Hao Deng and Jian Chen},
  journal={IEEE Communications Letters},
This letter investigates secure transmission in an intelligent reflecting surface (IRS) assisted non-orthogonal multiple access (NOMA) network. Consider a practical eavesdropping scenario with imperfect channel state information of the eavesdropper, we propose a robust beamforming scheme using artificial noise to guarantee secure NOMA transmission with the IRS. A joint transmit beamforming and IRS phase shift optimization problem is formulated to minimize the transmit power. Since the problem… 

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