376 citations · 861 across the 13 of their papers we have counts for
4 papers · 1 filter
Impact of 4D channel distribution on the achievable rates in coherent optical communication experiments
Tobias A. Eriksson, Tobias Fehenberger, Peter A. Andrekson +3
We experimentally investigate mutual information and generalized mutual information for coherent optical transmission systems. The impact of the assumed channel distribution on the…
Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems
Tobias Fehenberger, Domaniç Lavery, Robert Maher +3
Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 dB and 0.8 dB are de…
LDPC Coded Modulation with Probabilistic Shaping for Optical Fiber Systems
Tobias Fehenberger, Georg Böcherer, Alex Alvarado +1
An LDPC coded modulation scheme with probabilistic shaping, optimized interleavers and noniterative demapping is proposed. Full-field simulations show an increase in transmission d…
On Achievable Rates for Long-Haul Fiber-Optic Communications
Tobias Fehenberger, Alex Alvarado, Polina Bayvel +1
Lower bounds on mutual information (MI) of long-haul optical fiber systems for hard-decision and soft-decision decoding are studied. Ready-to-use expressions to calculate the MI ar…