Jointly Correlated Dual-Side Fluid Antenna System
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866913042524012544 |
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| author | Zhang, Zhentian Wu, Yuanhui Wong, Kai-Kit Jiang, Hao Li, An |
| author_facet | Zhang, Zhentian Wu, Yuanhui Wong, Kai-Kit Jiang, Hao Li, An |
| contents | Fluid antenna systems (FASs) have introduced a new paradigm for wireless system design by revealing how mutual correlation can be exploited to harvest inherent spatial diversity. While existing studies have mainly focused on one-sided FAS configurations, i.e., with FAS deployed at either the transmitter or the receiver, this work investigates the ergodic capacity of a jointly correlated dual-side FAS under statistical eigenmode transmission. Specifically, a jointly correlated dual-side channel model is developed, and the corresponding ergodic capacity together with a tight closed-form upper bound is derived. In addition, the optimal power allocation is studied, and a practical iterative algorithm is proposed for its implementation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_16942 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Jointly Correlated Dual-Side Fluid Antenna System Zhang, Zhentian Wu, Yuanhui Wong, Kai-Kit Jiang, Hao Li, An Information Theory Fluid antenna systems (FASs) have introduced a new paradigm for wireless system design by revealing how mutual correlation can be exploited to harvest inherent spatial diversity. While existing studies have mainly focused on one-sided FAS configurations, i.e., with FAS deployed at either the transmitter or the receiver, this work investigates the ergodic capacity of a jointly correlated dual-side FAS under statistical eigenmode transmission. Specifically, a jointly correlated dual-side channel model is developed, and the corresponding ergodic capacity together with a tight closed-form upper bound is derived. In addition, the optimal power allocation is studied, and a practical iterative algorithm is proposed for its implementation. |
| title | Jointly Correlated Dual-Side Fluid Antenna System |
| topic | Information Theory |
| url | https://arxiv.org/abs/2604.16942 |