Dual-Side Fluid Antenna Multiple Access for Integrated Sensing and Communications in 6G Networks
2026 IEEE International Conference on Communications Workshops, ICC Workshops 2026, Glasgow, England, 24 - 28 May 2026, (Full Text)
- Publication Type: Conference Paper / Full Text
- Doi Number: 10.1109/iccworkshops63917.2026.11586303
- City: Glasgow
- Country: England
- Keywords: 6G, FAS, Fluid Antenna Multiple Access, ISAC, Port Selection
- Yıldız Technical University Affiliated: Yes
Abstract
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.