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- W1164877576 abstract "In coherent optical phase-shift-keying (PSK) system, the conventional decision-aided maximum likelihood (DA-ML) phase estimator only considers constant phase noise over the entire observation interval. In this paper, we take into account the time-varying phase noise and propose a flexible DA-ML phase estimator for carrier phase estimation. The weighted coefficients are introduced to estimate carrier phase more accurately than the conventional scheme. The phase estimation error of this flexible DA-ML receiver is analyzed and compared with results from the conventional DA-ML receiver. The analytical bit error rate (BER) follows well with Monte Carlo (MC) simulations. Simulation results also show that by using the flexible DA-ML receiver in quadrature PSK (QPSK) system, bit signal-to-noise ratio (SNR) improvement over the conventional DA-ML receiver at BER of 10 -3 is 0.2dB and 1.2dB with block length of 20 and 50, respectively, when the laser linewidth is 2MHz." @default.
- W1164877576 created "2016-06-24" @default.
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- W1164877576 date "2015-08-05" @default.
- W1164877576 modified "2023-09-23" @default.
- W1164877576 title "A flexible decision-aided maximum likelihood phase estimation method" @default.
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- W1164877576 doi "https://doi.org/10.1117/12.2193299" @default.
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