Indoor coverage enhancement for RIS-assisted communication systems: practical measurements and efficient grouping
Publication Date
Advisor
Institution Author
Başar, Ertuğrul
Co-Authors
Kayraklik, Sefa
Yildirim, Ibrahim
Gevez, Yarkin
Görçin, Ali
Journal Title
Journal ISSN
Volume Title
Publisher:
Institute of Electrical and Electronics Engineers Inc.
Abstract
Reconfigurable intelligent surface (RIS)-empowered communications represent exciting prospects as one of the promising technologies capable of meeting the requirements of the sixth generation networks such as low-latency, reliability, and dense connectivity. However, validation of test cases and real-world experiments of RISs are imperative to their practical viability. To this end, this paper presents a physical demonstration of an RIS-assisted communication system in an indoor environment in order to enhance the coverage by increasing the received signal power. We first analyze the performance of the RIS-assisted system for a set of different locations of the receiver and observe around 10 dB improvement in the received signal power by careful RIS phase adjustments. Then, we employ an efficient codebook design for RIS configurations to adjust the RIS states on the move without feedback channels. We also investigate the impact of an efficient grouping of RIS elements, whose objective is to reduce the training time needed to find the optimal RIS configuration. In our extensive experimental measurements, we demonstrate that with the proposed grouping scheme, training time is reduced from one-half to one-eighth by sacrificing only a few dBs in received signal power. © 2023 IEEE.
Description
Subject
Engineering, electrical and electronic, Telecommunications