Faculty of Engineering and Natural Sciences
End-to-end Performance in Wireless Networks
Wireless communications have rapidly evolved into the prevailing means of information transfer around the globe, from broadband to sensor and cellular networks. With the increasing demand for high quality multimedia applications, high fidelity reconstruction at the receiver and security are two important application layer requirements that need to be addressed in the communication system design. In this talk, we take a cross-layer approach and consider more involved transmission schemes that exploit the network structure and the characteristics of wireless transmission to improve the system performance in terms of fidelity and security.
In the first part of the talk, we consider transmission of continuous amplitude sources, such as video or audio, over block fading multiple-input multiple-output (MIMO) channels. We provide novel joint source-channel coding schemes to improve the end-to-end reconstruction quality and characterize the optimal system performance in the high signal-to-noise ratio (SNR) regime. We also discuss practical applications.
In the second part of the talk, we consider communication in the presence of additional security requirements. We study information theoretic security, which does not rely on computational limitations of the eavesdropper, from both source and channel coding perspectives. Our results indicate the potential of secure communications in low-complexity applications, such as sensor networks and RF-ID tags, in which on-device implementation of complicated and computationally intensive cryptographic algorithms is not feasible.
Bio: Deniz Gunduz received the B.S. degree in electrical and electronics engineering from the Middle East Technical University in 2002, and the M.S. and Ph.D. degrees in electrical engineering from Polytechnic University, Brooklyn, NY in 2004 and 2007, respectively. He is currently a postdoctoral Research Associate at the Department of Electrical Engineering, Princeton University and a consulting Assistant Professor at the Department of Electrical Engineering, Stanford University. In 2004, he was a summer researcher in the laboratory of information theory (LTHI) at EPFL in Lausanne, Switzerland.
He is the recipient of the 2008 Alexander Hessel Award of Polytechnic University given to the best PhD Dissertation, and a coauthor of the paper that received the Best Student Paper Award at the 2007 IEEE International Symposium on Information Theory. His research interests lie in the areas of wireless communications, security, multimedia, sensor networks and bioinformatics.
Jan. 29, 2009, 13:40, FENS G032