Séminaire ICI : Arsenia Chorti
Titre du séminaire et oratrice
Perfect Secrecy in Physical Layer Network Coding Systems from Structured Interference.
Arsenia Chorti (University of Essex).
Date et lieu
Mercredi 25 mai 2016, 14h30.
ENSEA, salle 384.
Physical layer network coding (PNC) has been proposed for next generation networks. In this talk, we investigate PNC schemes with embedded perfect secrecy by exploiting structured interference in relay networks with two users and a single relay. In a practical scenario where both users employ finite and uniform signal input distributions, we establish upper bounds (UB) on the achievable perfect secrecy rates and make these explicit when PAM modems are used. We then describe two simple, explicit encoders that can achieve perfect secrecy rates close to these UBs with respect to an untrustworthy relay in the single antenna and single relay setting. Lastly, we generalize our system to a MIMO relay channel where the relay has more antennas than the users and study optimal precoding matrices which maintain a required secrecy constraint. Our results establish that the design of PNC transmission schemes with enhanced throughput and guaranteed data confidentiality is feasible in next generation systems.
Dr Arsenia Chorti joined the School of Computer Science and Electronic Engineering of the University of Essex in October 2013 as a lecturer. She obtained her PhD from Imperial College London and has served as a Senior Lecturer at Middlesex University between 2008 and 2010. From 2010 to 2013 she was as a Marie Curie International Outgoing Fellow (MC-IOF) at Princeton University where she currently holds a visiting researcher status. Her research interests include, among others, physical layer security, physical layer network coding, signal processing for communications. She is a member of the IEEE and of the IEEE ComSoc Signal Processing, Communications and Electronics Technical Committee (SPCE TC).