Finite-blocklength Fluid Antenna Systems With Spatial Block-Correlation Channel Model
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arXiv
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| Hauptverfasser: | , , , , , , |
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| Format: | Preprint |
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2025
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| author | Zhang, Zhentian Wong, Kai-Kit Morales-Jimenez, David Jiang, Hao Ramírez-Espinosa, Pablo Chae, Chan-Byoung Masouros, Christos |
| author_facet | Zhang, Zhentian Wong, Kai-Kit Morales-Jimenez, David Jiang, Hao Ramírez-Espinosa, Pablo Chae, Chan-Byoung Masouros, Christos |
| contents | Massive connectivity with ultra-low latency and high reliability necessitates fundamental advances in future communication networks operating under finite-blocklength (FBL) transmission. Fluid antenna systems (FAS) have emerged as a promising enabler, offering superior spectrum and energy efficiency in short-packet/FBL scenarios. In this work, by leveraging the simplicity and accuracy of block-correlation channel modeling, we rigorously bound the performance limits of FBL-FAS from a statistical perspective, focusing on two key performance metrics: block error rate (BLER) and outage probability (OP). Furthermore, we introduce a novel complex-integral simplification method based on Gauss-Laguerre quadrature, which achieves higher approximation accuracy compared to existing Taylor-expansion-based approaches. Numerical results validate the robustness of the proposed analysis and clearly demonstrate the superiority of FBL-FAS over conventional multiple-antenna systems with fixed antenna placement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_24333 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Finite-blocklength Fluid Antenna Systems With Spatial Block-Correlation Channel Model Zhang, Zhentian Wong, Kai-Kit Morales-Jimenez, David Jiang, Hao Ramírez-Espinosa, Pablo Chae, Chan-Byoung Masouros, Christos Information Theory Massive connectivity with ultra-low latency and high reliability necessitates fundamental advances in future communication networks operating under finite-blocklength (FBL) transmission. Fluid antenna systems (FAS) have emerged as a promising enabler, offering superior spectrum and energy efficiency in short-packet/FBL scenarios. In this work, by leveraging the simplicity and accuracy of block-correlation channel modeling, we rigorously bound the performance limits of FBL-FAS from a statistical perspective, focusing on two key performance metrics: block error rate (BLER) and outage probability (OP). Furthermore, we introduce a novel complex-integral simplification method based on Gauss-Laguerre quadrature, which achieves higher approximation accuracy compared to existing Taylor-expansion-based approaches. Numerical results validate the robustness of the proposed analysis and clearly demonstrate the superiority of FBL-FAS over conventional multiple-antenna systems with fixed antenna placement. |
| title | Finite-blocklength Fluid Antenna Systems With Spatial Block-Correlation Channel Model |
| topic | Information Theory |
| url | https://arxiv.org/abs/2509.24333 |