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On Performance of RIS-Aided Fluid Antenna Systems

Ghadi, Farshad Rostami; Wong, Kai-Kit; New, Wee Kiat; Xu, Hao; Murch, Ross; Zhang, Yangyang; (2024) On Performance of RIS-Aided Fluid Antenna Systems. IEEE Wireless Communications Letters 10.1109/lwc.2024.3405636. (In press). Green open access

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Abstract

This letter studies the performance of reconfigurable intelligent surface (RIS)-aided communications for a fluid antenna system (FAS) enabled receiver. Specifically, a fixed single-antenna base station (BS) transmits information through a RIS to a mobile user which is equipped with a planar fluid antenna in the absence of a direct link. We first analyze the spatial correlation structures among the positions (or ports) in the planar FAS, and then derive the joint distribution of the equivalent channel gain at the user by exploiting the central limit theorem. Furthermore, we obtain compact analytical expressions for the outage probability (OP) and delay outage rate (DOR). Numerical results illustrate that using FAS with only one activated port into the RIS-aided communication network can greatly enhance the performance, when compared to traditional antenna systems (TAS).

Type: Article
Title: On Performance of RIS-Aided Fluid Antenna Systems
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/lwc.2024.3405636
Publisher version: http://dx.doi.org/10.1109/lwc.2024.3405636
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Reconfigurable intelligent surfaces, Antennas, Fluids, Correlation, Signal to noise ratio, Wireless communication, Transmission line matrix methods
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10193015
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