Abstract
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 of 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.
© 2012 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription