Maximum-Likelihood Phase and Channel Estimation for Coherent Optical OFDM

Author

Shieh, W.

Author_Institution

Univ. of Melbourne, Melbourne

Volume

20

Issue

8

fYear

2008

fDate

4/15/2008 12:00:00 AM

Firstpage

605

Lastpage

607

Abstract

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.

Keywords

OFDM modulation; channel estimation; decision feedback equalisers; intercarrier interference; maximum likelihood estimation; optical fibre communication; optical fibre dispersion; phase estimation; CO-OFDM system; ML decision-feedback; coherent optical OFDM system; coherent optical orthogonal frequency-division-multiplexed system; intercarrier interference; laser phase noise; linear fiber dispersion effects; maximum-likelihood channel estimation; maximum-likelihood phase estimation; optical amplifiers; Channel estimation; Dispersion; Maximum likelihood estimation; OFDM; Optical fiber amplifiers; Optical noise; Phase estimation; Phase noise; Semiconductor optical amplifiers; Stimulated emission; Coherent communications; intercarrier interference (ICI); maximum-likelihood (ML) estimation; orthogonal frequency-division multiplexing (OFDM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.918873

Filename

4475236