Maximum Likelihood-Based Blind Dispersion Estimation for Coherent Optical Communication
Journal article, 2012

Starting from the maximum likelihood criterion, we derive a novel blind chromatic dispersion (CD) estimation method in the presence of unknown data, propagation delay, polarization state, and differential group delay. By using CD estimation, electronic dispersion compensation (EDC) can be carried out without prior knowledge about the amount of accumulated CD. This adds flexibility to the EDC, which may prove valuable in reconfigurable optical networks. Using numerical simulations, we compare the suggested algorithm with a well-known CD estimation algorithm based on the constant modulus algorithm. We find that the proposed algorithm has better estimation performance and lower computational complexity. Furthermore, the impact of differential group delay is small. The derivation of the algorithm also shows the close connection between CD estimation, clock recovery, and polarization effects.

coherent optical communication

Optical fiber communication

optical fiber dispersion


Henk Wymeersch

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Pontus Johannisson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Journal of Lightwave Technology

0733-8724 (ISSN)

18 2976-2982

Areas of Advance

Information and Communication Technology

Subject Categories


Signal Processing



More information