eprintid: 10205321
rev_number: 7
eprint_status: archive
userid: 699
dir: disk0/10/20/53/21
datestamp: 2025-02-27 09:58:06
lastmod: 2025-02-27 09:58:06
status_changed: 2025-02-27 09:58:06
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Hong, Hanjiang
creators_name: Wong, Kai-Kit
creators_name: Tong, Kin-Fai
creators_name: Shin, Hyundong
creators_name: Zhang, Yangyang
title: Coded Fluid Antenna Multiple Access Over Fast Fading Channels
ispublished: inpress
divisions: UCL
divisions: B04
divisions: F46
keywords: Fluid antenna, multiple access, coded modulation, iterative decoding, interference mitigation
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: Enabled by the emerging fluid antenna system (FAS) technology, fast fluid antenna multiple access (FAMA) provides a massive connectivity scheme which is able to serve on the same physical channel hundreds of users, without the need of precoding nor interference cancellation at each user. This is, however, only possible if we know the antenna position (i.e., port) in which the ratio of the instantaneous signal energy to the sum-interference plus noise signal energy is maximized on a per-symbol basis. In this letter, we address how fast FAMA can be approached using practical channel codes. This technique is referred to as coded FAMA. An iterative decoding receiver with a novel soft-decision port detector and the correlated demapper is proposed. Also, the average mutual information (AMI) for the coded FAMA system is derived to indicate the system’s achievable transmission rate. Our results reveal that the spectral efficiency of the coded FAMA system can well approach the AMI with the proposed iterative decoding receiver. Moreover, it is illustrated that under rich scattering fast fading channels, the proposed coded FAMA system can support 120 users on the same channel to achieve a network spectral efficiency of 75bps/Hz, without precoding.
date: 2025-02-11
date_type: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
official_url: https://doi.org/10.1109/lwc.2025.3540668
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2364360
doi: 10.1109/LWC.2025.3540668
lyricists_name: Tong, Kin-Fai
lyricists_name: Wong, Kai-Kit
lyricists_id: KFTON30
lyricists_id: KWONG98
actors_name: Wong, Kai-Kit
actors_id: KWONG98
actors_role: owner
full_text_status: public
publication: IEEE Wireless Communications Letters
issn: 2162-2337
citation:        Hong, Hanjiang;    Wong, Kai-Kit;    Tong, Kin-Fai;    Shin, Hyundong;    Zhang, Yangyang;      (2025)    Coded Fluid Antenna Multiple Access Over Fast Fading Channels.                   IEEE Wireless Communications Letters        10.1109/LWC.2025.3540668 <https://doi.org/10.1109/LWC.2025.3540668>.    (In press).    Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10205321/1/WCL2024-1236-RSv3.pdf