In this letter, we investigate Rate-Splitting Multiple Access (RSMA) for an uplink communication system with finite blocklength. Considering a two-user Single-Input Single-Output (SISO) Multiple Access Channel (MAC), we study the impact of Signal-to-Noise Ratio (SNR), blocklength, power allocation and target rate on the error probability performance of RSMA where one user message is split. We demonstrate that RSMA can improve the error probability performance significantly compared to Non-Orthogonal Multiple Access (NOMA) and RSMA can have a larger rate region than NOMA.

翻译：在此信里,我们调查了使用一定轮廓长度的连接通信系统(RSMA)的速率分解多重存取(RSMA)问题。考虑到双用户单一投入单一输出(SISO)多存取频道(MAC),我们研究了信号对噪音比率(SNR)、轮廓、电源分配和目标率对一个用户信息被分割的RSMA误差概率性能的影响。我们证明RSMA与非正统多存取(NOMA)和RSMA相比,可以大大改进误差概率性能。