eprintid: 10196838 rev_number: 7 eprint_status: archive userid: 699 dir: disk0/10/19/68/38 datestamp: 2024-09-11 10:54:55 lastmod: 2024-09-11 10:54:55 status_changed: 2024-09-11 10:54:55 type: article metadata_visibility: show sword_depositor: 699 creators_name: Zheng, Y creators_name: Tang, J creators_name: Zheng, B creators_name: Wong, KK title: In-Depth Analysis of HARQ Performance in Active RIS-Assisted RSMA Systems ispublished: pub divisions: UCL divisions: B04 divisions: F46 note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: Utilizing reconfigurable intelligent surface (RIS) technology to construct an intelligent radio environment is essential for the development of the sixth-generation (6G) communication network which is marked by ultra-high speed, minimal latency, and extensive connectivity. Therefore, to further enhance the coverage and signal quality of wireless communication systems, we investigate an active RIS-assisted rate-splitting multiple access (RSMA) system. Specifically, we investigate the effect of relevant parameters on system performance by deriving the analytical expressions for the outage probability (OP) of users employing hybrid automatic repeat request (HARQ) transmission strategy. The numerical results show that: 1) The reliability of the system is improved by combining HARQ transmission strategy. 2) The increase in the number of reconfigurable elements also significantly enhances the stability performance of the considered system. date: 2024-01-01 date_type: published publisher: Institute of Electrical and Electronics Engineers (IEEE) official_url: http://dx.doi.org/10.1109/lwc.2024.3445503 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2311207 doi: 10.1109/LWC.2024.3445503 lyricists_name: Wong, Kai-Kit lyricists_id: KWONG98 actors_name: Wong, Kai-Kit actors_id: KWONG98 actors_role: owner full_text_status: public publication: IEEE Wireless Communications Letters issn: 2162-2337 citation: Zheng, Y; Tang, J; Zheng, B; Wong, KK; (2024) In-Depth Analysis of HARQ Performance in Active RIS-Assisted RSMA Systems. IEEE Wireless Communications Letters 10.1109/LWC.2024.3445503 <https://doi.org/10.1109/LWC.2024.3445503>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10196838/1/Final_wcl.pdf