文献类型：期刊文献

英文题名：Cross-Domain Transmission Scheme for Uplink OTFS-RSMA Based on Heterogeneous Mobile User Grouping

作者：Huai, Qiwei[1];Yuan, Weina[1];Wu, Yue[1];Fan, Pingzhi[2]

机构：[1]East China Univ Sci & Technol, Sch Informat Sci & Engn, Shanghai 200237, Peoples R China;[2]Southwest Jiaotong Univ, Key Lab Informat Coding & Transmiss, Chengdu 611756, Peoples R China

年份：2024

卷号：28

期号：5

起止页码：1181

外文期刊名：IEEE COMMUNICATIONS LETTERS

收录：;EI(收录号：20241115732274);WOS:【SCI-EXPANDED(收录号:WOS:001218818600001)】；

基金：No Statement Available

语种：英文

外文关键词：RSMA; OTFS; outage performance; user fairness

摘要：Rate Splitting Multiple Access (RSMA) is an emerging technology that extends traditional multiple access techniques, such as Non-Orthogonal Multiple Access (NOMA) and Space Division Multiple Access (SDMA), with significant advantages in enhancing QoS and user fairness. In this letter, based on Orthogonal Time-Frequency Space (OTFS) and RSMA, an uplink OTFS-RSMA cross-domain transmission scheme is proposed based on heterogeneous mobile user grouping, where the high mobility users are served in the delay-Doppler domain and the low mobility users are served in the time-frequency domain. Specifically, the OTFS-RSMA scheme pairs one high-speed user with one low-speed user for cross-domain transmission using RSMA. To further enhance outage performance and user fairness, two kinds of Cognitive Radio (CR) Rate Splitting (RS) detection strategies are applied, that is, the CR for low-speed user splitting (CR-L) and CR for high-speed user splitting (CR-H), respectively. Furthermore, a modified Atkinson index is proposed to evaluate user fairness. Our simulation results show that the proposed OTFS-RSMA scheme significantly outperforms OTFS-NOMA in terms of outage performance and user fairness.