Date: November 14, 2012
Speaker: Prof. Ashish Khisti, Department of Electrical and Computer Engineering, University of Toronto
Location: EE Conference Room
Security and Multimedia are two key challenges in the next generation wireless systems. In this talk, we will discuss how information theoretic analysis can lead to new insights in addressing such challenges.
The first part of the talk will discuss the role of physical layer in enhancing security of wireless systems. We will focus on the secret-key generation application and present an architecture of a provably efficient system that exploits channel reciprocity for maximizing the secret-key rate. Our result implies that training-only schemes widely used in the literature can be far from optimal, whereas a scheme that consists of a training phase and a randomness-sharing phase can be near optimal in certain conditions.
The second part of the talk will focus on error correction mechanisms in real-time streaming communication systems. We show that good error correction codes for streaming data are fundamentally different than classical error correction codes and propose a general construction for such codes. Numerical simulations over a Gilbert-Eliott channel indicate significant performance gains from the proposed codes for streaming data.
Ashish Khisti has been an assistant professor at the Department of Electrical and Computer Engineering (ECE) of the University of Toronto. since September 2009. He received his BASc degree in Engineering Sciences (EE Option) from the University of Toronto and his S.M and Ph.D. degrees from the Massachusetts Institute of Technology (MIT). Professor Khisti is a recipient of the Hewlett Packard Innovation Research Program (IRP) award (2011, 2012) and an Early Researcher Award from the province of Ontario (2012). His current research work focuses on wireless physical-layer security and multimedia communication systems.