Performance Limits of Fluid Antenna Systems

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Performance Limits of Fluid Antenna Systems

Wong, K-K; Shojaeifard, A; Tong, K-F; Zhang, Y; (2020) Performance Limits of Fluid Antenna Systems. IEEE Communications Letters 10.1109/LCOMM.2020.3006554. (In press). Green open access

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Abstract

Fluid antenna represents a concept where a mechanically flexible antenna can switch its location freely within a given space. Recently, it has been reported that even with a tiny space, a single-antenna fluid antenna system (FAS) can outperform an L-antenna maximum ratio combining (MRC) system in terms of outage probability if the number of locations (or ports) the fluid antenna can be switched to, is large enough. This letter aims to study if extraordinary capacity can also be achieved by FAS with a small space. We do this by deriving the ergodic capacity, and a capacity lower bound. This letter also derives the level crossing rate (LCR) and average fade duration (AFD) for the FAS.

Type:	Article
Title:	Performance Limits of Fluid Antenna Systems
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1109/LCOMM.2020.3006554
Publisher version:	https://doi.org/10.1109/LCOMM.2020.3006554
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:	Capacity, Fluid antennas, MIMO
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/10104026