Despite decades-long development, underwater communication systems still cannot achieve high data rates and long communication ranges at the same time. Currently, the acoustic communication is the only choice to achieve long distances. However, the inherent low acoustic bandwidth results in extremely low data rates. In this talk, the acoustic Reconfigurable Intelligent Surface (RIS) system is proposed to realize high-data-rate and long-range underwater communications. Although the EM-based RIS has been widely investigated in terrestrial scenarios in recent years, the underwater acoustic RIS is based on completely different physics principles. Hence, the EM based terrestrial RISs do not work for underwater acoustic signals. Moreover, the long acoustic wave propagation delay, the inherent wideband nature, and the water behavior all impose unique challenges in underwater RIS operation. Therefore, this talk presents a new hardware design to realize acoustic RIS, based on which the underwater RIS operation protocols are developed to address the aforementioned challenges. The proposed acoustic RIS system can be considered as an underwater infrastructure that enables MIMO functionalities for all types of devices, especially small robots and low-cost sensors. The simulation results show that the proposed acoustic RIS system can efficiently reflect acoustic waves and dramatically increase communication data rates and distances.
I.F. Akyildiz (Life Fellow, IEEE) received the B.S., M.S., and Ph.D. degrees in Electrical and Computer Engineering from the University of Erlangen–Nürnberg, Germany, in 1978, 1981, and 1984, respectively. He is the Ken Byers Chair Professor Emeritus in Telecommunications, the Past Chair of the Telecom Group at the ECE, and the Director of the Broadband Wireless Networking Laboratory, Georgia Institute of Technology, where he served from 1985 until 2020. He is an Advisory Board member at the Technology Innovation Institute (TII-ARRC) Abu Dhabi, United Arab Emirates, since June 2020. He is also Founder and President of the Truva Inc., a consulting company based in Georgia, USA, since 1989. He is the Founder and the Editor-in-Chief of the newly established of International Telecommunication Union Journal on Future and Evolving Technologies (ITU J-FET) since August 2020. He had many international affiliations during his career and established research centers in Spain, South Africa, Finland, Saudi Arabia, Germany, Russia, India and Cyprus. Dr. Akyildiz is an IEEE Fellow since 1996, and ACM Fellow since 1997. He received numerous awards from IEEE, ACM, and other professional organizations, including Humboldt Award from Germany and Tubitak Award from Turkey. In June 2022, according to Google Scholar his h-index is 135 and the total number of citations to his articles is more than 139+K. His current research interests include Networking 2030, Metaverse, Hologram and Extended Reality Communication, 6G/7G wireless systems, Terahertz Communication, Underwater Communication.