Intelligent Reflecting Surface Aided Multicasting With Random Passive Beamforming

@article{Tao2021IntelligentRS,
  title={Intelligent Reflecting Surface Aided Multicasting With Random Passive Beamforming},
  author={Qin Tao and Shuowen Zhang and Caijun Zhong and Rui Zhang},
  journal={IEEE Wireless Communications Letters},
  year={2021},
  volume={10},
  pages={92-96}
}
In this letter, we consider a multicast system where a single-antenna transmitter sends a common message to multiple single-antenna users, aided by an intelligent reflecting surface (IRS) equipped with <inline-formula> <tex-math notation="LaTeX">${N}$ </tex-math></inline-formula> passive reflecting elements. Prior works on IRS have mostly assumed the availability of channel state information (CSI) for designing its passive beamforming. However, the acquisition of CSI requires substantial… 

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