eprintid: 10204639 rev_number: 7 eprint_status: archive userid: 699 dir: disk0/10/20/46/39 datestamp: 2025-02-12 11:13:01 lastmod: 2025-02-12 11:13:01 status_changed: 2025-02-12 11:13:01 type: article metadata_visibility: show sword_depositor: 699 creators_name: Yao, J creators_name: Zheng, J creators_name: Wu, T creators_name: Jin, M creators_name: Yuen, C creators_name: Wong, KK creators_name: Adachi, F title: FAS-RIS Communication: Model, Analysis, and Optimization ispublished: pub divisions: UCL divisions: B04 divisions: F46 keywords: Fluid antenna system (FAS), outage probability, reconfigurable intelligent surface (RIS) note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: This correspondence investigates the novel fluid antenna system (FAS) technology, combining with reconfigurable intelligent surface (RIS) for wireless communications, where a base station (BS) communicates with a FAS-enabled user with the assistance of a RIS. To analyze this technology, we derive the outage probability based on the block-diagonal matrix approximation (BDMA) model. With this, we obtain the upper bound, lower bound, and asymptotic approximation of the outage probability to gain more insights. Moreover, we design the phase shift matrix of the RIS in order to minimize the system outage probability. Simulation results confirm the accuracy of our approximations and that the proposed schemes outperform benchmarks significantly. date: 2025-01-01 date_type: published publisher: Institute of Electrical and Electronics Engineers (IEEE) official_url: https://doi.org/10.1109/tvt.2025.3537294 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2360022 doi: 10.1109/TVT.2025.3537294 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 Transactions on Vehicular Technology issn: 0018-9545 citation: Yao, J; Zheng, J; Wu, T; Jin, M; Yuen, C; Wong, KK; Adachi, F; (2025) FAS-RIS Communication: Model, Analysis, and Optimization. IEEE Transactions on Vehicular Technology 10.1109/TVT.2025.3537294 <https://doi.org/10.1109/TVT.2025.3537294>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10204639/1/WCL2024-FASRIS-T-v2.pdf