Dual-Side Fluid Antenna Multiple Access for Integrated Sensing and Communications in 6G Networks

Karli A., SHAH A. F. M. S., KARABULUT M. A.

2026 IEEE International Conference on Communications Workshops, ICC Workshops 2026, Glasgow, İngiltere, 24 - 28 Mayıs 2026, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/iccworkshops63917.2026.11586303
  • Basıldığı Şehir: Glasgow
  • Basıldığı Ülke: İngiltere
  • Anahtar Kelimeler: 6G, FAS, Fluid Antenna Multiple Access, ISAC, Port Selection
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Integrated sensing and communication (ISAC) is considered a fundamental building block for achieving high spectrum efficiency in 6G networks. However, conventional fixed-position antenna (FPA) systems face significant performance bottlenecks due to insufficient spatial degrees of freedom (DoF), particularly in interference-limited multi-user scenarios. This paper proposes and analyzes a unique dual-side fluid antenna multiple access (Dual-Side FAMA) architecture where both the base station (BS) and user equipment (UE) are equipped with fluid antenna systems (FAS). A joint optimization problem is formulated that maximizes radar detection and communication quality by leveraging the ability of FAS to change port positions. The proposed dual-sided approach, unlike existing studies that focus solely on configurability at the base station side, creates a broad set of spatial solutions to eliminate multiuser interference (MUI) while simultaneously enhancing target echo strength. Due to the NP-hard nature of the resulting discrete port selection problem, a low-complexity alternating optimization (AO) algorithm has been developed. The simulations conducted within the scope of this study confirm that the dual-sided FAMA architecture significantly expands the ISAC Pareto-optimal region compared to basic FPA and single-sided FAS systems. In particular, the scalability for high-density 6G network deployments has been validated, showing that the proposed method maintains sum-rate even in environments with urban clutter.