eprintid: 10194089 rev_number: 7 eprint_status: archive userid: 699 dir: disk0/10/19/40/89 datestamp: 2024-07-03 08:50:03 lastmod: 2024-07-03 08:50:03 status_changed: 2024-07-03 08:50:03 type: article metadata_visibility: show sword_depositor: 699 creators_name: Ghadi, Farshad Rostami creators_name: Kaveh, Masoud creators_name: Wong, Kai-Kit creators_name: Zhang, Yangyang title: Performance Analysis of FAS-Aided Backscatter Communications ispublished: inpress divisions: UCL divisions: B04 divisions: C05 divisions: F46 keywords: Backscatter communication, correlated fading channel, fluid antenna system, outage probability note: This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: In this letter, we study the performance of backscatter communications (BC) over the position-flexible fluid antenna system (FAS) technology. We consider a situation where a single fixed-antenna source sends information to a FAS reader through the wireless forward (i.e., source-to-tag) and backscatter (i.e., tag-to-reader) channels. We first derive the cumulative distribution function (CDF) of the equivalent channel at the FAS receiver, and obtain closed-form expressions for the outage probability (OP) and the delay outage rate (DOR) assuming a correlated Rayleigh distribution. To gain more insights into the system performance, we present analytical expressions of the diversity order, OP and DOR in the high signal-to-noise ratio (SNR) regime. Numerical results reveal that FAS at the reader can significantly improve the performance of BC compared with a fixed-antenna reader. date: 2024-06-19 date_type: published publisher: Institute of Electrical and Electronics Engineers (IEEE) official_url: https://doi.org/10.1109/LWC.2024.3416700 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2291061 doi: 10.1109/LWC.2024.3416700 lyricists_name: Rostamighadi, Farshad lyricists_name: Wong, Kai-Kit lyricists_id: FROST43 lyricists_id: KWONG98 actors_name: Flynn, Bernadette actors_id: BFFLY94 actors_role: owner full_text_status: public publication: IEEE Wireless Communications Letters issn: 2162-2337 citation: Ghadi, Farshad Rostami; Kaveh, Masoud; Wong, Kai-Kit; Zhang, Yangyang; (2024) Performance Analysis of FAS-Aided Backscatter Communications. IEEE Wireless Communications Letters 10.1109/LWC.2024.3416700 <https://doi.org/10.1109/LWC.2024.3416700>. (In press). Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10194089/1/Performance_Analysis_of_FAS-Aided_Backscatter_Communications.pdf