Performance Evaluation of Concatenated Rate Splitting Multiple Access for 6G Multiuser Communication System

Abstract

Rate splitting multiple access (RSMA) technology successfully mitigates same-channel interference among users and enhances system performance through flexible control of rate distribution. This study presents an integration of 6G concatenated code with RSMA to offer an improved ultra-reliable communication for a 6G multi-cell communication system. In current wireless communication networks, having imperfect channel state information (CSI) is unavoidable, which leads to significant multi-user interference in multi-antenna broadcast channels, which reduces the data rate, system reliability, reducing the overall quality of service (QoS). This study, breaks this limitation and propose a novel scheme, denoted as Concatenated Rate Splitting Multiple Access (C-RSMA), that relies on the 6G coding technique to encode the private parts of RSMA data blocks. The study demonstrate that the rate region of C-RSMA in a multiple input single output (MISO) system with partial CSI is expanded beyond that of traditional coded RSMA, where C-RSMA achieves higher data rate of 103 Tbps, and 99.95% reliability.