Institute for Computer Research, CGL and HCI present a seminar on
Prof. Bobak Nazer, Assistant Professor, Department of Electrical and Computer Engineering, Boston University
Friday, March 30, 2012
DC 1302, Davis Centre, University of Waterloo
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 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 relay networks, interference channels, distributed source coding, distributed interference cancellation, and physical layer network coding, among others.
Bobak Nazer is an Assistant Professor in the Department of Electrical and Computer Engineering at Boston University. He received the M.S. and Ph.D degrees from the University of California, Berkeley and the B.S. E.E. degree from Rice University, all in electrical engineering. From 2009 to 2010, he was a postdoctoral associate in the Department of Electrical and Computer Engineering at the University of Wisconsin, Madison. He won the Eli Jury award from the EECS Department at UC Berkeley in 2009 for his dissertation research and a Dean's Catalyst Award from Boston University in 2011.
Sponsored by: Professor Amir Khandani, RIM-NSERC Industrial Research Chair, Canada Research Chair, Department of Electrical and Computer Engineering, University of Waterloo, firstname.lastname@example.org
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