CARLETON WIRELESS SEMINAR SERIES

Time: Thursday, 01 August 2019, 2:00-3:00 pm
Place: Carleton University, Systems and Computer Engineering
The Maker Lab, 4463 Mackenzie Building, map.

Title: PHYSICAL-LAYER SECURITY FOR DUAL-HOP RF/FSO SYSTEMS

Speaker: Dr. Eylem Erdogan
Assistant Professor, Department of Electrical and Electronics Engineering, Istanbul Medeniyet University, Turkey
Visiting Professor, Department of Systems and Computer Engineering, Carleton University

* ABSTRACT: Wireless data traffic has been increasing at a tremendous rate over the past years to meet the ever-increasing demand for ubiquitous internet connection. To meet the demand, one of the emerging technologies is free space optical communication (FSO). FSO communication can provide secure and reliable communication over unlicensed optical spectrum. Owing to these potentials, FSO systems can be used in campus connectivity, video monitoring, security issues and broadcasting in special events like sports and ceremonies in 5G+ networks. Despite its numerous advantages, the performance of optical wireless communication can be severely degraded by the atmospheric turbulence induced fading. To reduce the severe effects of turbulence and to fill in the last mile connectivity problem in backbone networks, FSO systems can be employed with its RF counterpart in a dual-hop configuration. The so-called mixed RF-FSO communication can reap the advantages of FSO systems while dealing with the atmospheric turbulence induced fading.

The tremendous rate in wireless data traffic have also arisen concerns on the information theoretic security of wireless networks. So far, the wireless communication security has been provided with the aid of various encryption methods. However, recent studies have shown that these encryption methods rely on the complicated mathematical functions and cannot be implemented in practical wireless systems due to their complex nature. To this end, physical layer security, which exploits the channel characteristics of the wiretap channel has been attracted considerable interest to enhance the security of wireless systems. In FSO systems, an illegitimate eavesdropper can block the laser beam to tackle the confidential information or a line-of-sight eavesdropper can collect the information reflected from the aerosols and small particles due to adverse weather conditions. Likewise, in RF communication, a passive eavesdropper can collect the source information. Thereby, investigating RF/FSO systems from the physical-layer security perspective can be an interesting topic.

* BIO: Eylem Erdogan received B.Sc. and M.Sc. degree from Işık University, Istanbul, Turkey and the Ph.D. degree from Kadir Has University, Istanbul, Turkey in 2014 all in electronics engineering. He is currently an Assistant Professor in the Department of Electrical and Electronics Engineering, Istanbul Medeniyet University. He was a Post-Doctoral Fellow in Electrical Engineering department, Lakehead University, Thunder Bay, ON, Canada, from March 2015 to September 2016. His research interests are in the broad areas of wireless communications, including signal processing for wireless communications, the performance analysis of cooperative relaying in cognitive radio networks, unmanned aerial vehicle communications and networks and free space optical communications.

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