Open AccessFaster-than-Nyquist and beyond: how to improve spectral efficiency by accepting interference
Author(s) -
Giulio Colavolpe,
Tommaso Foggi,
Andrea Modenini,
Amina Piemontese
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.026600
Subject(s) - nyquist–shannon sampling theorem , bandwidth (computing) , computer science , spectral efficiency , optics , modulation (music) , interference (communication) , transmission (telecommunications) , nonlinear system , electronic engineering , nyquist stability criterion , telecommunications , physics , mathematics , channel (broadcasting) , parametric statistics , statistics , quantum mechanics , acoustics , engineering , computer vision
We investigate the application of time and frequency packing techniques, an extension of the classical faster-than-Nyquist signaling, to long-haul optical links. These techniques provide a significant spectral efficiency increase and represent a viable alternative to overcome the theoretical and technological issues related to the use of high-order modulation formats. Adopting these techniques, we successfully demonstrate through simulations the transmission of 1 Tbps over 200 GHz bandwidth in a realistic (nonlinear) long-haul optical link.