Rate-Splitting Multiple Access for Intelligent Reflecting Surface Aided Multi-User Communications

Intelligent reflecting surface (IRS) has recently emerged as a promising technology for 6 G wireless systems, due to its capability reconfigure the propagation environment. In this paper, we investigate Rate-Splitting Multiple Access (RSMA) IRS-assisted downlink system, where base station (BS) communicates with single-antenna users help of an IRS. RSMA relies on rate-splitting (RS) at BS and successive interference cancellation (SIC) provides generalized multiple access framework. We derive new architecture called IRS-RS that leverages interplay between RS For performance analysis, utilize on-off control technique passive beamforming vector closed-form expressions outage probability cell-edge near users. Moreover, also analyze behavior sufficiently large number elements. Additionally, cooperative based decode-and-forward (DF)-assisted framework DF-RS. Through simulation results, it is shown proposed outperforms corresponding DF-RS, without IRS conventional non-orthogonal (NOMA) schemes. Furthermore, impact various system's parameters such elements system revealed.