eprintid: 10197479
rev_number: 8
eprint_status: archive
userid: 699
dir: disk0/10/19/74/79
datestamp: 2024-09-26 10:30:18
lastmod: 2024-09-30 15:24:40
status_changed: 2024-09-26 10:30:18
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Ghadi, Farshad Rostami
creators_name: Wong, Kai-Kit
creators_name: Javier López-Martínez, F
creators_name: Chae, Chan-Byoung
creators_name: Tong, Kin-Fai
creators_name: Zhang, Yangyang
title: A Gaussian Copula Approach to the Performance Analysis of Fluid Antenna Systems
ispublished: pub
divisions: UCL
divisions: B04
divisions: F46
keywords: Fluid antenna system, 
arbitrary fading, 
correlation, 
Gaussian copula, 
SISO, 
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: This paper investigates the performance of a single-user fluid antenna system (FAS), by exploiting a class of elliptical copulas to describe the dependence structure amongst the fluid antenna positions (ports). By expressing the well-known Jakes’ model in terms of the Gaussian copula, we consider two cases: (i) the general case, i.e., any arbitrary correlated fading distribution; and (ii) the specific case, i.e., correlated Nakagami- m fading. For both scenarios, we first derive analytical expressions for the cumulative distribution function (CDF) and probability density function (PDF) of the equivalent channel in terms of multivariate normal distribution. Then we obtain the outage probability (OP) and the delay outage rate (DOR) to analyze the performance of FAS. By employing the popular rank correlation coefficients such as Spearman’s ρ and Kendall’s τ, we measure the degree of dependency in correlated arbitrary fading channels and illustrate how the Gaussian copula can be accurately connected to Jakes’ model in FAS. Our numerical results demonstrate that increasing the size of FAS provides lower OP and DOR, but the system performance saturates as the number of antenna ports increases. In addition, our results indicate that FAS provides better performance compared to conventional single-fixed antenna systems even when the size of fluid antenna is small.
date: 2024
date_type: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
official_url: https://doi.org/10.1109/TWC.2024.3454558
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2319493
doi: 10.1109/twc.2024.3454558
lyricists_name: Rostamighadi, Farshad
lyricists_name: Tong, Kin-Fai
lyricists_name: Wong, Kai-Kit
lyricists_id: FROST43
lyricists_id: KFTON30
lyricists_id: KWONG98
actors_name: Wong, Kai-Kit
actors_id: KWONG98
actors_role: owner
full_text_status: public
publication: IEEE Transactions on Wireless Communications
issn: 1536-1276
citation:        Ghadi, Farshad Rostami;    Wong, Kai-Kit;    Javier López-Martínez, F;    Chae, Chan-Byoung;    Tong, Kin-Fai;    Zhang, Yangyang;      (2024)    A Gaussian Copula Approach to the Performance Analysis of Fluid Antenna Systems.                   IEEE Transactions on Wireless Communications        10.1109/twc.2024.3454558 <https://doi.org/10.1109/twc.2024.3454558>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10197479/1/Paper-TW-Mar-24-0511.pdf