  Efficient integration of reconfigurable intelligent surfaces (RISs) into the
current wireless network standard is not a trivial task due to the overhead
generated by performing channel estimation (CE) and phase-shift optimization.
In this paper, we propose a framework enabling the coexistence between
orthogonal-frequency division multiplexing (OFDM) and RIS technologies. Instead
of wasting communication symbols for the CE and optimization, the proposed
framework exploits the localization information obtainable by RIS-aided
communications to provide a robust allocation strategy for user multiplexing.
The results demonstrate the effectiveness of the proposed approach with respect
to CE-based transmission methods.
