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Opt Express. 2009 Jan 19;17(2):703-15.

Decision-aided maximum likelihood detection in coherent optical phase-shift-keying system.

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Department of Electrical & Computer Engineering, National University of Singapore,117576, Singapore.


A novel decision-aided maximum likelihood (DA ML) technique is proposed to estimate the carrier phase in coherent optical phase-shift-keying system. The DA ML scheme is a totally linear computational algorithm which is feasible for on-line processing in the real systems. The simulation results show that the DA ML receiver can outperform the conventional Mth power scheme, especially when the nonlinear phase noise is dominant.


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