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In this paper, we address the power allocation problem for a decode andforward (DF) relay system, where a massive multiple-input-multiple-output(mMIMO) multi-carrier (MC) base station (BS) node communicates with a MC singleantenna node directly and also through the single antenna full duplex (FD) MCrelay, using rate splitting (RS) approach. Successive interference cancellationapproach is adopted at the destination. We consider orthogonal frequencydivision multiplexing (OFDM) as our MC strategy. We take into account theimpact of hardware distortions resulting in residual self-interference andinter-carrier leakage (ICL), and also imperfect channel state information(CSI). We formulate a joint sub-carrier and power allocation problem tomaximize the total sum rate. An iterative optimization method is proposed,which follows successive inner approximation (SIA) framework to reach theconvergence point that satisfies the Karush-Kuhn-Tucker (KKT) conditions.Numerical results show the significance of distortion-aware design for suchsystems, and also the significant gain in terms of sum rate compared to itshalf duplex (HD) and also non-rate splitting scheme.

Rate Splitting for Massive MIMO Multi-carrier system using Full Duplex Decode and Forward Relay with Hardware Impairments