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Fishbowl teleseminar: Radio Coexistence

April 18, 2013 @ 4:00 am - 5:00 pm

Prof. Sachin Katti
Stanford University


Wireless is the dominant mode of personal communication, but by it’s very nature, wireless transmissions are vulnerable to RF (Radio Frequency) interference from various sources. This weakness is a growing problem for technologies that operate in unlicensed frequency bands, as these bands are becoming more crowded over time. The increasing density of radios, coupled with the growing number of different protocols, dictates that future wireless devices will require the ability to coexist and operate in a crowded and often unregulated electromagnetic environment.


In this talk, I will present a set of architectures and mechanisms for wireless coexistence. These mechanisms are intended as general primitives, enabling future wireless networks to be architected such that they are aware of who their RF neighbors are, what they are doing, and how to respond to them. I will be focusing on two systems, each demonstrating how changes at different levels across the network stack can provide significant gains. DOF is a robust and accurate technique to detect activity in any band of the relevant spectrum, while Picasso is an extensible radio design which allows the device to systematically exploit the fragmented bands which are available. Both of these systems marry novel algorithms that span signal processing, circuit design, and software systems – making a compelling case for cross-layer interdisciplinary radio design in order to solve the problems of wireless coexistence.


Sachin Katti is currently an Assistant Professor of Electrical Engineering and Computer Science at Stanford University. He received his PhD in EECS from MIT in 2009. His research focuses on designing and building next generation high capacity wireless networks using techniques from information and coding theory. His dissertation research focused on redesigning wireless mesh networks with network coding as the central unifying design paradigm. The dissertation won the 2008 ACM Doctoral Dissertation Award – Honorable Mention, the George Sprowls Award for Best Doctoral Dissertation in EECS at MIT. His work on network coding was also awarded a MIT Deshpande Center Innovation Grant, and won the 2009 William Bennett Prize for Best Paper in IEEE/ACM Transactions on Networking. He has also won the Best Student Paper Award at ACM SIGCOMM 2012, the Sloan Fellowship, Best Demonstration Award at Mobicom 2010, the NSF Career Award as well as Okawa, Hooover, Packard and Terman Faculty Fellowships. His research interests are in networks, wireless communications, applied coding theory and security.


April 18, 2013
4:00 am - 5:00 pm