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We show that phase noise estimation based on Bayesian filtering outperforms conventional time-domain approaches in the presence of moderate measurement noise. Additionally, carrier synchronization based on Bayesian filtering, in combination with expectation maximization, is demonstrated for the first time experimentally
Employing a known training sequence robust and precise PDL and OSNR monitoring is demonstrated over a wide range of combined distortions. The proposed in-service monitoring technique is insensitive to CD, PMD and SOP rotation.
We derive three novel data-aided CFO estimators based on a new autocorrelation function which is defined using cyclostationary properties of the repetitive preamble. The first estimator is a generalization of a classic estimator, and the other two take advantage of the structure of the new autocorrelation function to improve the estimation for low CFO. In addition, the performance of the proposed...
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