Faster-than-Nyquist and beyond: how to improve spectral efficiency by accepting interference

Abstract (100 Word Limit): Shannon theory explains that orthogonal signaling with Gaussian inputs achieves capacity on the bandlimited AWGN channel. Hence, for many years, communication systems for quasi-static channels have been designed based on orthogonal signaling. However, when low-order constellations are used, performance can be considerably improved by giving up the orthogonality, thus accepting interference. Faster-than-Nyquist signaling is an example of this paradigm. We describe a new information-theoretic approach to the more general technique of time-frequency packing and we show how it translates into practical design rules. Presenter Bio (100 Word Limit): Giulio Colavolpe is an Associate Professor at the University of Parma, Italy. His main research interests include digital transmission theory, adaptive signal processing, channel coding and information theory. He is also co-author of the book Detection Algorithms for Wireless Communications, with Applications to Wired and Storage Systems (New York: John Wiley & Sons, 2004). He is currently serving as an Editor for the IEEE Transactions on Wireless Communications and as an Executive Editor for the European Transactions on Telecommunications.