IRS-Enhanced LED Number Modulation with Adaptive LED Selection for MIMO-OWC

In this paper, we propose and investigate an intelligent reflecting surface (IRS)-enhanced LED number modulation (LNM) scheme with adaptive LED selection for multiple-input multiple-output optical wireless communication (MIMO-OWC) systems. By performing LNM with location-aware adaptive LED selection, additional information bits can be transmitted through varying the number of activated LEDs and improved diversity gain can also be harvested. Moreover, an IRS is further applied to substantially enhance the overall performance of the MIMO-OWC system using LNM with adaptive LED selection. Simulation results verify the feasibility and superiority of the proposed LNM scheme with adaptive LED selection and IRS enhancement for MIMO-OWC systems.