Events Calendar

On Feasibility of Interference Alignment in MIMO Interference Networks...

and A New Training Protocol for Channel State Estimation in Wireless Relay NetworksSpeaker: Cenk M. Yetis,
Satellite Communications and Remote Sensing
Istanbul Technical University
Istanbul, TurkeyAbstract: In the first part of the talk, we explore the conditions required for interference alignment to be applied in a K-user MIMO interference network. Interference alignment is a recent popular scheme not only due to its ability to allocate 1/2 of the bandwidth for each user simultaneously (conventional schemes, e.g., TDMA and FDMA, can allocate 1/K of the bandwidth) but also due to its linearity (requires a simple design of transmit and receive beamforming vectors).
Cross-layer design with interference alignment by using the results of this work is an interesting future work. In addition, an extension of this work to X networks (every transmitter transmits to every receiver) and flexible X networks (every transmitter does not necessarily transmit to every receiver) is not trivial and more questions rise from cross-layer design aspect. In fact, bandwidth limit per user for flexible X networks is also an interesting future work from information theoretic aspect. Finally, an iterative algorithm for interference alignment in these networks is still an open problem. Approximate talk length is 30 minutes.
In the second part of the talk, we introduce a new training protocol for channel state estimation in wireless relay networks that provides a higher network capacity and a faster transfer of channel state information (CSI) than the existing training protocols.
Our approach enables us to obtain the effective SNR (eSNR) of a MIMO wireless relay network as a function of important parameters including the number of relays, antennas, and channel estimation errors. An interesting future work is the optimization of these and other important parameters for wireless relay networks including the training time, power, and structure in order to maximize the eSNR (thus the capacity). Approximate talk length is 20 minutes.Biography: Cenk M. Yetis received his B.Sc. degree in Electronics Engineering from Isik University, Istanbul, Turkey in 2001. He received his M.Sc. degree in Telecommunications Engineering from Istanbul Technical Univer-sity (ITU), Istanbul, Turkey in 2004. He expects to receive his Ph.D. degree in Satellite Remote Sensing and Communication from ITU in 2010. He received The Turkish Scientific and Technological Research Council of Turkey (TUBITAK) scholarship from 2005 to 2009. From 2003 to 2007, he was full-time employed by Avea, one of the top three wireless services providers in Turkey, where he held rotational responsibilities in operation and planning groups. Since 2007, he has been a visiting researcher abroad including Ohio State University and University of California Irvine. His research interests include signal processing, information theory, and communication theory for wireless communications. His detailed CV is available online at http://sites.google.com/site/cenkmyetis/.Host: Gerhard Kramer, gkramer@usc.edu, EEB 536, x07229

Location: Hughes Aircraft Electrical Engineering Center (EEB) - 539

Audiences: Everyone Is Invited

Contact: Gerrielyn Ramos