@article{discovery10193015, note = {This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.}, title = {On Performance of RIS-Aided Fluid Antenna Systems}, year = {2024}, journal = {IEEE Wireless Communications Letters}, publisher = {Institute of Electrical and Electronics Engineers (IEEE)}, keywords = {Reconfigurable intelligent surfaces, Antennas, Fluids, Correlation, Signal to noise ratio, Wireless communication, Transmission line matrix methods}, author = {Ghadi, Farshad Rostami and Wong, Kai-Kit and New, Wee Kiat and Xu, Hao and Murch, Ross and Zhang, Yangyang}, url = {http://dx.doi.org/10.1109/lwc.2024.3405636}, abstract = {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).}, issn = {2162-2337} }