  Reconfigurable intelligent surface (RIS)-empowered communication is an
emerging technology that has recently received growing attention as a potential
candidate for next-generation wireless communications. Although RISs have shown
the potential of manipulating the wireless channel through passive beamforming,
it is shown that they can also bring undesired side effects, such as reflecting
the electromagnetic interference (EMI) from the surrounding environment to the
receiver side. In this study, we propose a novel EMI cancellation scheme to
mitigate the impact of the EMI by exploiting its special time-domain structure
and considering a clever passive beamforming method at the RIS. Compared to its
benchmark, computer simulations show that the proposed scheme achieves superior
performance in terms of the average signal-to-interference-plus-noise ratio
(SINR) and outage probability (OP), especially when the EMI power is comparable
to the power of the information signal impinging on the RIS surface.
