TY  - JOUR
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
KW  - Fluid antenna system
KW  -  ISAC
KW  -  port selection
AV  - public
TI  - Shifting the ISAC Trade-Off With Fluid Antenna Systems
SN  - 2162-2337
EP  - 3483
IS  - 12
SP  - 3479
VL  - 13
JF  - IEEE Wireless Communications Letters
A1  - Zou, Jiaqi
A1  - Xu, Hao
A1  - Wang, Chao
A1  - Xu, Lvxin
A1  - Sun, Songlin
A1  - Meng, Kaitao
A1  - Masouros, Christos
A1  - Wong, Kai-Kit
PB  - Institute of Electrical and Electronics Engineers (IEEE)
Y1  - 2024/12//
UR  - http://dx.doi.org/10.1109/lwc.2024.3473991
ID  - discovery10198506
N2  - As an emerging reconfigurable antenna technology, fluid antenna system (FAS) has the capability of improving both sensing and communication (S&C) performance by switching the antenna position over the available ports. This increased spatial degree-of-freedom (DoF) by FAS can be translated into enlarging the trade-off region for integrated sensing and communication (ISAC). In this letter, we propose a signal model for FAS-enabled ISAC and jointly optimize the transmit beamforming and port selection of FAS. In particular, our objective is to minimize the transmit power, while satisfying both communication and sensing requirements. To tackle this, an efficient iterative algorithm based on sparse optimization, convex approximation, and a penalty approach is developed. Our simulation results illustrate that the proposed scheme can attain 33% reductions in the transmit power with guaranteed S&C performance, showing the great potential of FAS for striking a balance between S&C in ISAC systems.
ER  -