TY - INPR TI - On Performance of RIS-Aided Fluid Antenna Systems SN - 2162-2337 Y1 - 2024/// AV - public N2 - This letter studies the performance of reconfigurable intelligent surface (RIS)-aided communications for a fluid antenna system (FAS) enabled receiver. Specifically, a fixed single-antenna base station (BS) transmits information through a RIS to a mobile user which is equipped with a planar fluid antenna in the absence of a direct link. We first analyze the spatial correlation structures among the positions (or ports) in the planar FAS, and then derive the joint distribution of the equivalent channel gain at the user by exploiting the central limit theorem. Furthermore, we obtain compact analytical expressions for the outage probability (OP) and delay outage rate (DOR). Numerical results illustrate that using FAS with only one activated port into the RIS-aided communication network can greatly enhance the performance, when compared to traditional antenna systems (TAS). ID - discovery10193015 UR - http://dx.doi.org/10.1109/lwc.2024.3405636 N1 - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions. KW - Reconfigurable intelligent surfaces KW - Antennas KW - Fluids KW - Correlation KW - Signal to noise ratio KW - Wireless communication KW - Transmission line matrix methods JF - IEEE Wireless Communications Letters PB - Institute of Electrical and Electronics Engineers (IEEE) A1 - Ghadi, Farshad Rostami A1 - Wong, Kai-Kit A1 - New, Wee Kiat A1 - Xu, Hao A1 - Murch, Ross A1 - Zhang, Yangyang ER -