Downlink OFDM-FAMA in 5G-NR Systems

Fluid antenna multiple access (FAMA), enabled by the fluid antenna system (FAS), offers a new and straightforward solution to massive connectivity. Previous results on FAMA were primarily based on narrowband channels. This paper studies the adoption of FAMA within the fifth-generation (5G) orthogonal frequency division multiplexing (OFDM) framework, referred to as OFDM-FAMA, and evaluate its performance in broadband multipath channels. We first design the OFDM-FAMA system, taking into account 5G channel coding and OFDM modulation. Then the system’s achievable rate is analyzed, and an algorithm to approximate the FAS configuration at each user is proposed based on the rate. Extensive link-level simulation results reveal that OFDM-FAMA can significantly improve the multiplexing gain over the OFDM system with fixed-position antenna (FPA) users, especially when robust channel coding is applied and the number of radio-frequency (RF) chains at each user is small.

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Publication Details

Journal
IEEE Transactions on Wireless Communications
Published
2025-06-16
DOI
https://doi.org/10.1109/twc.2025.3577771
Citations
10
Primary Topic
PAPR reduction in OFDM
Type
article
Field-Weighted Citation Impact
7.30

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article

Downlink OFDM-FAMA in 5G-NR Systems

Yin Xu, Ross Murch, Hyundong Shin, Kai‐Kit Wong et al.
10 citations
IEEE Transactions on Wireless Communications
PAPR reduction in OFDM
7.30
article

Downlink OFDM-FAMA in 5G-NR Systems

Yin Xu, Ross Murch, Hyundong Shin, Kai‐Kit Wong, Hanjiang Hong, Dazhi He, Hao Xu, Wenjun Zhang
article en
10 citations

Abstract

Fluid antenna multiple access (FAMA), enabled by the fluid antenna system (FAS), offers a new and straightforward solution to massive connectivity. Previous results on FAMA were primarily based on narrowband channels. This paper studies the adoption of FAMA within the fifth-generation (5G) orthogonal frequency division multiplexing (OFDM) framework, referred to as OFDM-FAMA, and evaluate its performance in broadband multipath channels. We first design the OFDM-FAMA system, taking into account 5G channel coding and OFDM modulation. Then the system’s achievable rate is analyzed, and an algorithm to approximate the FAS configuration at each user is proposed based on the rate. Extensive link-level simulation results reveal that OFDM-FAMA can significantly improve the multiplexing gain over the OFDM system with fixed-position antenna (FPA) users, especially when robust channel coding is applied and the number of radio-frequency (RF) chains at each user is small.

IEEE Transactions on Wireless CommunicationsVol. 24(12)
Shanghai Jiao Tong University (CN), Hong Kong University of Science and Technology (HK), Kyung Hee University (KR), Shandong Jiaotong University (CN), Institute for Advanced Study (DE), University College London (GB), Southeast University (CN), University of Hong Kong (HK)
National Natural Science Foundation of China, Shanghai Jiao Tong University, Engineering and Physical Sciences Research Council
Affordable and clean energy
Openalex Percentile: Top 3%
PAPR reduction in OFDM
7.30
DOIOpen Access PDFOpenAlex
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Downlink OFDM-FAMA in 5G-NR Systems — Yin Xu, Ross Murch, et al. · IEEE Transactions on Wireless Communications (2025) | TGRS Research Map | TGRS