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Downlink OFDM-FAMA in 5G-NR Systems

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arxiv 2501.06974 v1 pith:VWWJBH7M submitted 2025-01-12 cs.IT eess.SPmath.IT

Hanjiang Hong , Kai-Kit Wong , Hao Xu , Yin Xu , Hyundong Shin , Ross Murch , Dazhi He , Wenjun Zhang This is my paper · ORCID
classification cs.ITeess.SPmath.IT
keywords ofdm-famasystemantennafamaofdmchannelchannelscoding
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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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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Fluid Antenna System-Assisted Self-Interference Cancellation for In-Band Full Duplex Communications

    cs.IT 2025-06 conditional novelty 6.0 of 10

    A receiver-side fluid antenna that selects the port minimizing the loopback-to-desired channel power ratio delivers 14 to 40 dB self-interference cancellation in in-band full duplex links.

  2. Iterative Sparse Asymptotic Minimum Variance Based Channel Estimation in Fluid Antenna System

    eess.SP 2025-07 reject novelty 4.0 of 10

    The paper applies an iterative sparse covariance estimation algorithm, similar to SPICE, to fluid antenna channel estimation and reports simulation gains in BER and capacity over OMP and MMSE baselines.

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