Fluid antenna systems have at most K*=2⌈W⌉+1 significant independent eigenmodes set by aperture size W, enabling EDoF and WIM closed-form outage approximations that match exact diversity order and never underestimate performance.
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Fluid antenna systems enabling 6G: Principles, applica- tions, and research directions
14 Pith papers cite this work, alongside 32 external citations. Polarity classification is still indexing.
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2026 14representative citing papers
FAS channels are represented as AR(p) Gauss-Markov processes to derive the optimal MMSE interpolator, a tight lower bound on required observations, and a Kalman filter achieving that optimum with O(N) complexity.
Introduces E-FAS channel model and CRB analysis showing a new sensing regime with angular estimation gains over array-based and RIS-aided ISAC under fixed transmit power.
Derives closed-form Rayleigh distribution for minimum inter-port distance in planar fluid antenna arrays (scaling O(M^{-1})) and a 2x2 geometric inertia matrix governing universal CRB for joint elevation-azimuth estimation, with invariance to azimuth and a precision-ambiguity trade-off.
A fluid-antenna hybrid architecture for DOA estimation achieves near fully-digital accuracy while cutting RF hardware complexity and training overhead in 6G networks.
Fluid antenna systems and rate-splitting multiple access mutually strengthen each other to deliver better spectral efficiency and interference handling than fixed-antenna baselines in 6G scenarios.
Derives unified closed-form CRB and min-spacing PDF for finite-aperture fluid antenna arrays, then uses gradient optimization to achieve 30% CRB and 42.5% MSE reductions.
Fluid antennas combined with 1D-CNN channel reconstruction improve active user detection error rates and NMSE in unsourced random access via simulation.
Movable antenna positions are optimized to minimize CRB subject to an MSL constraint, yielding lower AoA MSE across SNR regimes than fixed-position arrays via SCA and 1-D search.
Closed-form outage analysis and fairness optimization for spatially correlated FAS-enabled RSMA in multiuser MISO systems, showing up to 92% OP reduction versus fixed antennas.
The paper introduces diffusion FAS, a DDPM-driven spatial selection method that enables generative spatial stealth (up to 100x suppression) and target isolation in object-side ISAC scenarios.
Stochastic geometry yields approximate SIR coverage probability, average user rate, and cell sum-rate for uplink CUMA, showing competitive performance under limited CSI.
MAGRPO accelerates MARL training for fluid antenna-assisted wireless networks by replacing the critic with group relative advantage estimation, cutting training time 30-40% while matching MAPPO sum-rate performance.
A unified CRB framework for activity detection in fluid and fixed antenna systems shows FAS can achieve strong spatial diversity gains with reduced complexity.
citing papers explorer
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How Many Independent Modes Does a Fluid Antenna Have? A Closed-Form Outage Analysis via Equivalent Degrees of Freedom
Fluid antenna systems have at most K*=2⌈W⌉+1 significant independent eigenmodes set by aperture size W, enabling EDoF and WIM closed-form outage approximations that match exact diversity order and never underestimate performance.
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Beyond Covariance: Generative Spatial Correlation Modeling and Channel Interpolation for Fluid Antenna Systems
FAS channels are represented as AR(p) Gauss-Markov processes to derive the optimal MMSE interpolator, a tight lower bound on required observations, and a Kalman filter achieving that optimum with O(N) complexity.
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Enormous Fluid Antenna Systems (E-FAS) for Wireless Sensing: Channel Modeling and Conditional Estimation Limits
Introduces E-FAS channel model and CRB analysis showing a new sensing regime with angular estimation gains over array-based and RIS-aided ISAC under fixed transmit power.
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Finite-Aperture Planar Fluid Antenna Array
Derives closed-form Rayleigh distribution for minimum inter-port distance in planar fluid antenna arrays (scaling O(M^{-1})) and a 2x2 geometric inertia matrix governing universal CRB for joint elevation-azimuth estimation, with invariance to azimuth and a precision-ambiguity trade-off.
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Hybrid Architecture Gets Fluid: A New Paradigm for Direction-of-arrival Estimation in 6G Networks
A fluid-antenna hybrid architecture for DOA estimation achieves near fully-digital accuracy while cutting RF hardware complexity and training overhead in 6G networks.
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Fluid Antennas Meet Rate-Splitting Multiple Access: A New Path Forward for 6G Networks
Fluid antenna systems and rate-splitting multiple access mutually strengthen each other to deliver better spectral efficiency and interference handling than fixed-antenna baselines in 6G scenarios.
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Finite-Aperture Fluid Antenna Array Design: Analysis and Algorithm
Derives unified closed-form CRB and min-spacing PDF for finite-aperture fluid antenna arrays, then uses gradient optimization to achieve 30% CRB and 42.5% MSE reductions.
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Fluid-Antenna-Aided Active User Detection With 1D-CNN Channel Reconstruction for Unsourced Random Access
Fluid antennas combined with 1D-CNN channel reconstruction improve active user detection error rates and NMSE in unsourced random access via simulation.
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Movable Antennas for Robust Wireless Sensing via Joint Cram\'er-Rao Bound and Sidelobe Minimization
Movable antenna positions are optimized to minimize CRB subject to an MSL constraint, yielding lower AoA MSE across SNR regimes than fixed-position arrays via SCA and 1-D search.
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Outage Analysis and Fairness Design for Spatially Correlated FAS-Enabled RSMA Systems
Closed-form outage analysis and fairness optimization for spatially correlated FAS-enabled RSMA in multiuser MISO systems, showing up to 92% OP reduction versus fixed antennas.
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Diffusion Fluid Antenna Systems for Resilient ISAC
The paper introduces diffusion FAS, a DDPM-driven spatial selection method that enables generative spatial stealth (up to 100x suppression) and target isolation in object-side ISAC scenarios.
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Stochastic Geometry Analysis of Uplink CUMA-Enabled Cellular Networks
Stochastic geometry yields approximate SIR coverage probability, average user rate, and cell sum-rate for uplink CUMA, showing competitive performance under limited CSI.
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MAGRPO: Accelerated MARL Training for Fluid Antenna-Assisted Wireless Network Optimization
MAGRPO accelerates MARL training for fluid antenna-assisted wireless networks by replacing the critic with group relative advantage estimation, cutting training time 30-40% while matching MAPPO sum-rate performance.
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Cramer-Rao Bounds for Activity Detection in Conventional and Fluid Antenna Systems
A unified CRB framework for activity detection in fluid and fixed antenna systems shows FAS can achieve strong spatial diversity gains with reduced complexity.