Frequency-Mixing Intelligent Reflecting Surfaces for Nonlinear Wireless Propagation

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We introduce the concept of frequency-mixing intelligent reflecting surface (FMx-IRS), where the elements of the surface continuously change the phases of the incident signals. In this way, the FMx-IRS acts as a frequency mixer and makes the propagation environment nonlinear, thereby introducing new frequencies. We study the basic features of the proposed concept and demonstrate its advantages that stem from the novel type of control over the wireless propagation. The channel decoupling feature and the correlation between reflected channels are elaborated for the architecture, and are validated by the simulations.

Original languageEnglish
Article number9420664
JournalI E E E Wireless Communications Letters
Issue number8
Pages (from-to)1672-1676
Number of pages5
Publication statusPublished - 2021


  • Channel estimation
  • Delays
  • Frequency estimation
  • Frequency modulation
  • Scattering
  • Time-frequency analysis
  • Wireless communication
  • intelligent reflecting surface
  • nonlinear wireless propagation.

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