论文简报
cs.IT 2605.25769v1 值得读

On the Performance of Single/Dual Fluid Antenna Systems

Jiangsheng Huangfu, Zhengyu Song, Tianwei Hou, Anna Li, Yuanwei Liu, Arumugam Nallanathan

发布日期：2026-05-25 12:19 相关性：1.0000 价值：0.7400 分类：cs.IT
arXiv 摘要 PDF 原文 网页正文

摘要

The emerging technology of fluid antenna systems (FASs) represents a promising next-generation reconfigurable antenna solution, capable of exploiting the full spatial diversity within a predefined space by finely reconfiguring the positions of radiating elements. In this paper, the performance of FAS over spatially correlated Rayleigh fading channels is investigated for two distinct scenarios: a multiple-input single-output (MISO) configuration, where a receiver with a single-antenna FAS is served by a multi-antenna transmitter (MISO-FAS), and a single-input single-output setup where single-antenna FASs are equipped at both the transmitter and receiver (Dual-FAS). Exact expressions and closed-form approximations for the outage probability (OP) of both the MISO-FAS and Dual-FAS models are derived as the core contributions of this work. To provide deeper insights into system performance, the diversity orders for each model are also derived and analyzed. Analytical results demonstrate that increasing the number of ports significantly enhances system performance. The theoretical analysis is corroborated by key findings from our simulations, demonstrating that: $i$) Both the MISO-FAS and Dual-FAS models achieve considerable performance gains as the number of ports is increased; $ii$) System performance for both configurations is inversely related to the level of port correlation; lower correlation leads to better performance; $iii$) In the high signal-to-noise ratio regime, the Dual-FAS model surpasses the performance of the MISO-FAS model.

相关性判断

high
相关方向
wireless_communications fading_channels diversity_analysis outage_probability
判断依据

ArXiv cs.IT paper on fluid antenna systems with outage probability, diversity order, and Rayleigh fading channel analysis, which is directly in wireless communications/adjacent information theory.

价值判断

Directly relevant cs.IT wireless paper on fluid antenna systems with outage probability and diversity analysis under spatially correlated Rayleigh fading. Structure evidence indicates concrete analytical contributions: exact OP expressions, closed-form bounds, diversity orders, and Monte Carlo validation. Technical value is clear for FAS performance analysis, but scope appears specialized and model-bound rather than broadly field-shifting.

核心问题与主要方法

核心问题

analyze outage performance and diversity of single/dual fluid antenna systems under spatial correlation

场景：Rayleigh fading channels with correlated FAS ports in two models: MISO-FAS with MRT at an N-antenna transmitter and M-port FAS receiver, and Dual-FAS with M_T transmit ports and M_R receive ports

主要方法

For MISO-FAS, the transmitter applies MRT and the receiver selects the FAS port with the largest instantaneous received SNR, reducing the performance analysis to the maximum of correlated precoding gains X_1,...,X_M. For Dual-FAS, the system selects the transmit-port/receive-port pair with the maximum channel gain among M_T M_R correlated subchannels. Spatial correlation is modeled through an equally correlated construction; for Dual-FAS the overall correlation matrix is represented through the Kronecker product of transmit and receive correlation matrices. The derivations use joint PDF/CDF analysis, chi-square and noncentral chi-square modeling, Rician conditional distributions, Marcum-Q functions, and upper/lower bounding of outage probability. Diversity-order interpretation comes from the OP upper-bound behavior: approximately N+M for MISO-FAS when ports are not fully correlated, and M_R M_T for Dual-FAS.

关键贡献与后续阅读

关键贡献

Provides a comparative analytical framework for MISO-FAS and Dual-FAS under correlated Rayleigh fading, instead of studying only a receiver-side single-FAS configuration. Derives joint PDF and CDF characterizations for the correlated channel gains in both MISO-FAS and Dual-FAS models. Derives exact outage probability expressions plus closed-form upper and lower bounds for both configurations. Characterizes diversity orders as N+M for MISO-FAS and M_T M_R for Dual-FAS, according to the provided structure and document excerpts. Validates analytical trends with Monte Carlo simulations and reports concrete qualitative regimes: more ports improve OP, stronger correlation degrades OP, MISO-FAS is better at low SNR, and Dual-FAS improves faster at high SNR.

研究启发

How sensitive are the diversity-order claims to the equally correlated port model versus more realistic geometry-dependent or nonuniform correlation? Do the exact OP expressions remain computationally practical for large M, M_T, and M_R, or are the bounds the only scalable evaluation tool? How would the MISO-FAS and Dual-FAS comparison change under Rician, Nakagami-m, hardware switching delay, CSI acquisition cost, or multi-user interference?

限制与不确定性

Assessment relies only on provided relevance and structure analysis, not full-paper verification. Novelty may be incremental if similar FAS outage/diversity results already exist for related channel or correlation models. Limitations are meaningful: Rayleigh-only setting, simplified port correlation model, and focus mainly on outage/diversity metrics.

参考文献

57 条
  1. G. J. Foschini and M. J. Gans, ``On limits of wireless communications in a fading environment when using multiple antennas,'' Wireless Pers. Commun., vol. 6, no. 3, pp. 311--335, Mar. 1998.
  2. A. Paulraj, D. Gore, R. Nabar, and H. Bölcskei, ``An overview of MIMO communications -- A key to gigabit wireless,'' Proc. IEEE, vol. 92, no. 2, pp. 198--218, Feb. 2004.
  3. L. Zheng and D. Tse, ``Diversity and multiplexing: A fundamental tradeoff in multiple-antenna channels,'' IEEE Trans. Inf. Theory, vol. 49, no. 5, pp. 1073--1096, May 2003.
  4. T. L. Marzetta, ``Noncooperative cellular wireless with unlimited numbers of base station antennas,'' IEEE Trans. Wireless Commun., vol. 9, no. 11, pp. 3590--3600, Nov. 2010.
  5. E. G. Larsson, O. Edfors, F. Tufvesson, and T. L. Marzetta, ``Massive MIMO for next generation wireless systems,'' IEEE Commun. Mag., vol. 52, no. 2, pp. 186--195, Feb. 2014.
  6. H. Q. Ngo, E. G. Larsson, and T. L. Marzetta, ``Energy and spectral efficiency of very large multiuser MIMO systems,'' IEEE Trans. Commun., vol. 61, no. 4, pp. 1436--1449, Apr. 2013.
  7. L. Lu, G. Y. Li, A. L. Swindlehurst, A. Ashikhmin, and R. Zhang, ``An overview of massive MIMO: Benefits and challenges,'' IEEE J. Sel. Topics Signal Process., vol. 8, no. 5, pp. 742--758, Oct. 2014.
  8. F. Tariq et al., ``A speculative study on 6G,'' IEEE Wireless Commun., vol. 27, no. 4, pp. 118--125, Aug. 2020.
  9. Z. Zhang et al., ``6G wireless networks: Vision, requirements, architecture, and key technologies,'' IEEE Veh. Technol. Mag., vol. 14, no. 3, pp. 28--41, Sept. 2019.
  10. W. Saad, M. Bennis, and M. Chen, ``A vision of 6G wireless systems: Applications, trends, technologies, and open research problems,'' IEEE Netw., vol. 34, no. 3, pp. 134--142, May/Jun. 2020.
  11. Z. Wang et al., ``Extremely large-scale MIMO: Fundamentals, challenges, solutions, and future directions,'' IEEE Wireless Commun., vol. 31, no. 3, pp. 117--124, Jun. 2024.
  12. Z. Wang et al., ``A tutorial on extremely large-scale MIMO for 6G: Fundamentals, signal processing, and applications,'' IEEE Commun. Surveys Tuts., vol. 26, no. 3, pp. 1560--1605, Thirdquarter 2024.
  13. Z. Ding et al., ``Application of non-orthogonal multiple access in LTE and 5G networks,'' IEEE Commun. Mag., vol. 55, no. 2, pp. 185--191, Feb. 2017.
  14. J. Zhao, ``A survey of intelligent reflecting surfaces (IRSs): Towards 6G wireless communication networks,'' Nov. 2019, arXiv:1907.04789. [Online]. Available:
  15. J. Li et al., ``An RIS-aided interference mitigation-based design for MIMO-NOMA in cellular networks,'' IEEE Trans. Green Commun. Netw., vol. 8, no. 1, pp. 317--329, Mar. 2024.
  16. T. Hou et al., ``Performance analysis for large intelligent surfaces enabled MIMO networks,'' in Proc. IEEE Int. Conf. Commun. (ICC), Dublin, Ireland, Jun. 2020, pp. 1--6.
  17. T. Hou et al., ``MIMO assisted networks relying on intelligent reflective surfaces: A stochastic geometry based analysis,'' IEEE Trans. Veh. Technol., vol. 71, no. 1, pp. 571--582, Jan. 2022.
  18. M. S. Sharawi, ``Printed multi-band MIMO antenna systems and their performance metrics,'' IEEE Antennas Propag. Mag., vol. 55, no. 5, pp. 218--232, Oct. 2013.
  19. P. S. Taluja and B. L. Hughes, ``Diversity limits of compact broadband multi-antenna systems,'' IEEE J. Sel. Areas Commun., vol. 31, no. 2, pp. 326--337, Feb. 2013.
  20. A. Alkhateeb, J. Mo, N. Gonzalez-Prelcic, and R. W. Heath, ``MIMO precoding and combining solutions for millimeter-wave systems,'' IEEE Commun. Mag., vol. 52, no. 12, pp. 122--131, Dec. 2014.
  21. S. Han, I. Chih-Lin, Z. Xu, and C. Rowell, ``Large-scale antenna systems with hybrid analog and digital beamforming for millimeter wave 5G,'' IEEE Commun. Mag., vol. 53, no. 1, pp. 186--194, Jan. 2015.
  22. R. Zi, X. Ge, J. Thompson, C.-X. Wang, H. Wang, and T. Han, ``Energy efficiency optimization of 5G radio frequency chain systems,'' IEEE J. Sel. Areas Commun., vol. 34, no. 4, pp. 758--771, Apr. 2016.
  23. K.-K. Wong, A. Shojaeifard, K.-F. Tong, and Y. Zhang, ``Fluid antenna systems,'' IEEE Trans. Wireless Commun., vol. 20, no. 3, pp. 1950--1962, Mar. 2021.
  24. K.-K. Wong, K.-F. Tong, Y. Zhang, and Z. Zheng, ``Fluid antenna system for 6G: When Bruce Lee inspires wireless communications,'' Electron. Lett., vol. 56, no. 24, pp. 1288--1290, Nov. 2020.
  25. K.-K. Wong, K.-F. Tong, Y. Shen, Y. Chen, and Y. Zhang, ``Bruce Lee-inspired fluid antenna system: Six research topics and the potentials for 6G,'' Front. Commun. Netw., vol. 3, Art. no. 853416, Mar. 2022.
  26. P. Ramírez-Espinosa, D. Morales-Jimenez, and K.-K. Wong, ``A new spatial block-correlation model for fluid antenna systems,'' IEEE Trans. Wireless Commun., early access, 2024, doi: 10.1109/TWC.2024.3434509.
  27. L. Zhu, W. Ma, and R. Zhang, ``Movable antennas for wireless communication: Opportunities and challenges,'' IEEE Commun. Mag., vol. 62, no. 6, pp. 114--120, Jun. 2024.
  28. A. Zhuravlev, V. Razevig, S. Ivashov, A. Bugaev, and M. Chizh, ``Experimental simulation of multi-static radar with a pair of separated movable antennas,'' in Proc. IEEE Int. Conf. Microw., Commun., Antennas Electron. Syst. (COMCAS), Tel Aviv, Israel, Nov. 2015, pp. 1--5.
  29. X. Li, Y. Zhou, Z. Shen, B. Song, and S. Li, ``Using a moving antenna to improve GNSS/INS integration performance under low-dynamic scenarios,'' IEEE Trans. Intell. Transp. Syst., vol. 23, no. 10, pp. 17717--17728, Oct. 2022.
  30. G. J. Hayes, J.-H. So, A. Qusba, M. D. Dickey, and G. Lazzi, ``Flexible liquid metal alloy (EGaIn) microstrip patch antenna,'' IEEE Trans. Antennas Propag., vol. 60, no. 5, pp. 2151--2156, May 2012.

底部评论

0 条根评论，可继续回复叠楼

0/2000