@inproceedings{9020382bdbfa4da19d55104bfaf34f77,
title = "Robust Design of Rate-Splitting Multiple Access With Imperfect CSI for Cell-Free MIMO Systems",
abstract = "Rate-Splitting Multiple Access (RSMA) for multi-user downlink operates by splitting the message for each user equipment (UE) into a private message and a set of common messages, which are simultaneously transmitted by means of su-perposition coding. The RSMA scheme can enhance throughput and connectivity as compared to conventional multiple access techniques by optimizing the rate-splitting ratios along with the corresponding downlink beamforming vectors. This work examines the impact of erroneous channel state information (CSI) on the performance of RSMA in cell-free multiple-input multiple-output (MIMO) systems. An efficient robust optimization algorithm is proposed by using closed-form lower bound expressions on the expected data rates. Extensive numerical results show the importance of robust design in the presence of CSI errors and how the performance gain of RSMA over conventional schemes is affected by CSI imperfection.",
keywords = "Rate-splitting multiple access, cell-free MIMO, imperfect CSI, robust design",
author = "Daesung Yu and Park, {Seok Hwan} and Osvaldo Simeone and {Shamai Shitz}, Shlomo",
note = "Funding Information: This work was supported by the National Research Foundation (NRF) of Korea Grants funded by the Ministry of Science and ICT under Grant NRF-2021R1C1C1006557; in part by the Ministry of Education under Grant 2021R1A6A3A13046157. This work was also supported by the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Programme under Grant 694630 and 725731. Funding Information: This work was supported by the National Research Foundation (NRF) of Korea Grants funded by the Ministry of Science and ICT under Grant NRF-2021R1C1C1006557; in part by the Ministry of Education under Grant 2021R1A6A3A13046157. This work was also supported by the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 Research and Innovation Programme under Grant 694630 and 725731. Publisher Copyright: {\textcopyright} 2022 IEEE.; 2022 IEEE International Conference on Communications Workshops, ICC Workshops 2022 ; Conference date: 16-05-2022 Through 20-05-2022",
year = "2022",
doi = "10.1109/ICCWorkshops53468.2022.9814531",
language = "English (US)",
series = "2022 IEEE International Conference on Communications Workshops, ICC Workshops 2022",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "604--609",
booktitle = "2022 IEEE International Conference on Communications Workshops, ICC Workshops 2022",
address = "United States",
}