Title :
Time-Frequency Packing for High-Capacity Coherent Optical Links
Author :
Colavolpe, Giulio ; Foggi, T.
Author_Institution :
Dipt. di Ing. dell´Inf., Univ. of Parma, Parma, Italy
Abstract :
We consider realistic long-haul optical links, with linear and nonlinear impairments, and investigate the application of time-frequency packing with low-order constellations as a possible solution to increase the spectral efficiency. A detailed comparison with available techniques from the literature will be also performed. We will see that this technique represents a feasible solution to overcome the relevant theoretical and technological issues related to this spectral efficiency increase and could be more effective than the simple adoption of high-order modulation formats.
Keywords :
light coherence; optical links; optical modulation; spectral analysis; time-frequency analysis; coherent optical link; high-order modulation; nonlinear impairment; realistic long-haul optical links; spectral efficiency; time-frequency packing; Bandwidth; Detectors; Integrated optics; Modulation; Nonlinear optics; Optical receivers; Coherent optical systems; faster-than-Nyquist signaling; high-order modulation formats; long-haul optical communications; spectral efficiency; time-frequency packing;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2014.2339321
