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ECE Graduate Seminar Lecture

Science / Technology - Lecture/Discussion - WPI Only

Monday, March 11, 2013
11:00 AM-11:50 AM

Atwater Kent Laboratories
AK 219

Harnessing Interference

Bobak Nazer
Assistant Professor
Department of Electrical and Computer Engineering,
Boston University

In a wireless network, interference between transmitters is usually viewed as highly undesirable and clever algorithms and protocols have been devised to avoid it. Collectively, these strategies transform the physical layer into a set of reliable bit pipes which can then be used seamlessly by higher layers in the protocol stack. Unfortunately, interference avoidance results in sharply decreasing rates as the number of users increases.

This talk proposes a new strategy, compute-and-forward, that exploits the interference property of the wireless channel to achieve higher end-to-end rates in a network. The key idea is that users should decode linear functions of the transmitted messages according to their observed channel coefficients rather than treating interference as noise. Structured codes (such as linear codes or lattices) ensure that these linear combinations can be decoded reliably, often at far higher rates than the messages individually. Historically, codes with linear structure have been studied as a stepping stone to more practical constructions. More recently, several groups have shown that algebraic structure can significantly enhance performance in scenarios that include relay networks, interference channels, distributed source coding, distributed interference cancellation, and physical layer network coding. This talk will overview our recent results in this direction, with a focus on applications to low-complexity MIMO decoding and interference alignment.

Bobak Nazer is an Assistant Professor in the Department of Electrical and Computer Engineering at Boston University. He completed his graduate studies at the University of California, Berkeley where he received the M.S. degree in 2005 and the Ph.D degree in 2009, both in Electrical Engineering and Computer Sciences. Prior to this, he was an undergraduate at Rice University where he received the B.S. degree in Electrical and Computer Engineering in 2003. From 2009 to 2010, he was a postdoctoral associate in the Department of Electrical and Computer Engineering at the University of Wisconsin, Madison. He received the NSF CAREER Award in 2013, the Dean's Catalyst Award from the BU College of Engineering in 2011, and the Eli Jury Award from the UC Berkeley EECS Department in 2009.

Host: Professor Lifeng Lai

Suggested Audiences: College


Last Modified: March 5, 2013 at 9:17 AM

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