Intelligent Reflecting Surface Assisted MISO Downlink: Channel Estimation and Asymptotic Analysis

@article{AlNahhas2020IntelligentRS,
  title={Intelligent Reflecting Surface Assisted MISO Downlink: Channel Estimation and Asymptotic Analysis},
  author={Bayan Al-Nahhas and Qurrat-Ul-Ain Nadeem and A. Chaaban},
  journal={GLOBECOM 2020 - 2020 IEEE Global Communications Conference},
  year={2020},
  pages={1-6}
}
This work makes the preliminary contribution of studying the asymptotic performance of a multi-user intelligent reflecting surface (IRS) assisted-multiple-input single-output (MISO) downlink system under imperfect CSI. We first extend the existing least squares (LS) ON/OFF channel estimation protocol to a multi-user system, where we derive minimum mean squared error (MMSE) estimates of all IRS-assisted channels over multiple sub-phases. We also consider a low-complexity direct estimation (DE… Expand
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