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Maximum-Likelihood Phase and Channel Estimation for Coherent Optical OFDM

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1 Author(s)
W. Shieh ; Univ. of Melbourne, Melbourne

We present a channel model for a coherent optical orthogonal frequency-division-multiplexed (CO-OFDM) system including linear fiber dispersion effects and noises from optical amplifiers and intercarrier interference induced by laser phase noise. Based upon this model, we derive maximum-likelihood (ML) phase estimation and channel estimation for the CO-OFDM system. Both computer simulation and transmission experiment of the CO-OFDM system show that the ML decision-feedback following pilot-assisted phase estimation gives the optimal performance.

Published in:

IEEE Photonics Technology Letters  (Volume:20 ,  Issue: 8 )