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Performance Evaluation of Phase Estimation Algorithms in Equalized Coherent Optical Systems

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3 Author(s)
Pessoa, L.M. ; Inst. de Eng. de Sist. e Comput. do Porto (INESC Porto), Univ. do Porto, Porto, Portugal ; Salgado, H.M. ; Darwazeh, I.

We assess the performance of a coherent optical system employing a phase estimation algorithm combined with a least mean square decision-directed equalizer in a feedback configuration and compare it to the constant modulus algorithm with an independent carrier phase estimation approach for 16-quadratic-amplitude-modulation transmission. Both series and parallel implementations are discussed. Hardware issues regarding a recursive implementation of the estimation filter are also reported.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 17 )