Two-way Channels (Feedback Studied Right)

EECS Colloquium

Featuring Ashu Sabharwal, Ph.D.
Director, Center for Multimedia Communication
Assistant Professor, Electrical and Computer Engineering
Rice University

Location: McDonnell Douglas Engineering Auditorium
Free and open to the public

Abstract
In this talk, we focus on the challenge of studying feedback in wireless systems. By modeling feedback channels as two-way channels, we show that feedback resources can be fully accounted for (without resorting to a Genie). Two sample problems are studied. 

First is a point-to-point fading channel, where we derive a lower bound on diversity-multiplexing tradeoff with noisy feedback. Second is the Gaussian multi-user channel, where we show how finite noisy feedback can improve net throughput of the system.

The work is inspired by our over-arching objective to build and deploy a full-scale operational wireless network in Houston. We will outline those efforts and an open-source effort to enable it at larger scale.

Ashu Sabharwal is a faculty member at Rice University, Houston, Texas, and director of the Center for Multimedia Communications (CMC). His major research focus is wireless networking, communication and information theory and experimental wireless systems. 

Ashu received the B.Tech. degree from Indian Institute of Technology, New Delhi in 1993 and M.S. and Ph.D. degrees from the Ohio State University in 1995 and 1999 respectively. He was the recipient of Presidential Dissertation Fellowship award in 1998.

He is currently an associate editor for IEEE Transactions on Wireless Communications. He served as technical co-chair of the wireless personal communication systems symposium at IEEE VTC 2005, and has served on the program committee of several conferences including IEEE INFOCOM, SIGCOMM Workshops, WinMee and GLOBECOM.

Please visit the EECS Colloquium website for a complete list of lectures.