A flexible decision-aided maximum likelihood phase estimation method

Jian Chen; Ping Wang; Xiaodi You; Changyuan Yu

doi:10.1117/12.2193299

5 August 2015 A flexible decision-aided maximum likelihood phase estimation method

Jian Chen, Ping Wang, Xiaodi You, Changyuan Yu

Proceedings Volume 9619, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing; 961907 (2015) https://doi.org/10.1117/12.2193299
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China

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^-3is 0.2dB and 1.2dB with block length of 20 and 50, respectively, when the laser linewidth is 2MHz.

Citation Download Citation

Jian Chen, Ping Wang, Xiaodi You, and Changyuan Yu "A flexible decision-aided maximum likelihood phase estimation method", Proc. SPIE 9619, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing, 961907 (5 August 2015); https://doi.org/10.1117/12.2193299

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