Dissertation Defense - Samet Yıldız (PHDEE)

Samet Yıldız – Ph.D. Electrical and Electronics Engineering

Prof. Murat Uysal – Advisor

Date: 22.12.2022

Time: 13.00

Location: AB1 409

“Experimental Characterization of Underwater Visible Light Communications”

Prof. Murat Uysal, Özyeğin University

Asst. Prof. Dr. Kadir Durak, Özyeğin University

Assoc. Prof. Cenk Demiroğlu, Özyeğin University

Prof. Serhan Yarkan, İstanbul Ticaret University

Assoc. Prof. Sultan Aldırmaz Çolak, Kocaeli University

Abstract:

The transparency of optical signals in the visible light spectrum has prompted researchers to study underwater visible light communication (UVLC). Many experimental studies have been conducted to achieve high data rates and long distances with practical deployments in addition to theoretical research. However, previous empirical studies have not validated the UVLC channel model for path loss. Therefore, experimental verification is needed for semi-collimated optical signals propagating underwater. In this dissertation, we experimentally verify the UVLC path loss for semi-collimated signals and examine the system's performance. We then investigate the performance constraints of the UVLC system in the absence of turbulence and pointing errors. Next, we present the non-line of sight (NLOS) UVLC path loss channel model analytically and experimentally. Finally, we examine the impact of solar energy on the performance of vertical UVLC links in underwater communication deployment scenarios.

Bio:

Samet Yıldız is an Electrical and Electronics Engineer currently working as the RF Systems Engineering team leader at Airties Wireless Networks. He received a B.Sc. in Electrical and Electronics Engineering from Yeditepe University (January 2012, Istanbul - Turkey) and M.Sc. in Electrical Engineering from California State University, Long Beach (May 2015, California - USA). In 2015, he started working in Airties Wireless Networks as his full-time position while starting part-time doctorate studies under Prof. Murat Uysal at Özyeğin University, Istanbul, Turkey. His current research interests include RF and Wireless Communication Systems, Wi-Fi Systems, and experimental communication system design in optical and RF fields.