Polyphase Filterbanks: Neat Tricks with Digital Signal Processing
Location:258 Fitzpatrick Hall
The move towards handling increased signal processing duties in software has opened up a significant number of new possibilities and algorithms. One such class of algorithms uses the polyphase filterbank. While dating back a few decades, the implementation and use of these filters is not yet widely understood or used, but they provide a few basic primitives that allow us to manipulate signals in incredible ways that are both precise and economical. This talk will introduce the basic components of polyphase filterbanks and explain their use in various signal processing tasks. Many algorithms and techniques using these filterbanks are part of the GNU Radio package, which will be used for demonstration and visualization. A basic understanding of digital signal processing, especially digital filtering is expected. However, the talk will focus more on concepts and visuals than on detailed mathematics, and should be a fun and interactive.
GNU Radio / Rondeau Research LLC
Tom Rondeau holds a Ph.D. from Virginia Tech in Electrical Engineering, graduating in 2007. He is the current maintainer and lead developer of GNU Radio, is a visiting scholar with the University of Pennsylvania, and former postdoctoral research engineer with CTVR, Trinity College in Dublin, Ireland from 2007 to 2008. He works as a consultant on GNU Radio and wireless technology through his firm Rondeau Research, LLC. Tom's Ph.D. dissertation on cognitive radio received the Council of Graduate School's Distinguished Dissertation for Math, Science, and Engineering. His research interests span areas of communications theory, signal processing and software design, which are all a part of his larger interests in software and cognitive radios.