title: Faster-than-Nyquist and beyond: how to improve spectral efficiency by accepting interference.
abstract: 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.
authors.affiliation: University of Parma, Dipartimento di Ingegneria dell’Informazione, and CNIT Research Unit, Parma, Italy. giulio@unipr.it
authors.forename: Giulio
authors.initials: G
authors.lastname: Colavolpe
authors.forename: Tommaso
authors.initials: T
authors.lastname: Foggi
authors.forename: Andrea
authors.initials: A
authors.lastname: Modenini
authors.forename: Amina
authors.initials: A
authors.lastname: Piemontese
mesh_terms: D000465:Algorithms; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D016247:Information Storage and Retrieval / Q000379:methods*; D055096:Optical Devices; D018401:Sample Size; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*