2006
DOI: 10.1109/lpt.2006.873921
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Coherent demodulation of optical multilevel phase-shift-keying signals using homodyne detection and digital signal processing

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Cited by 82 publications
(40 citation statements)
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“…Future work will incorporate improving the accuracy of this model using higher-order Taylor expansion and developing the analytical models for the BER evaluation in other carrier phase estimation approaches, such as the block average and the Viterbi-Viterbi algorithms [7,9,14], considering the impacts of EEPN. In addition, optical back-propagation will also be investigated for mitigating the EEPN and compensating the fiber nonlinearities in the long-haul transmission systems.…”
Section: Resultsmentioning
confidence: 99%
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“…Future work will incorporate improving the accuracy of this model using higher-order Taylor expansion and developing the analytical models for the BER evaluation in other carrier phase estimation approaches, such as the block average and the Viterbi-Viterbi algorithms [7,9,14], considering the impacts of EEPN. In addition, optical back-propagation will also be investigated for mitigating the EEPN and compensating the fiber nonlinearities in the long-haul transmission systems.…”
Section: Resultsmentioning
confidence: 99%
“…Hence, the phase ambiguity Δφ in the recovered data comes from the carrier phase fluctuation between the two adjacent symbols Δφ=φ k -φ (k+1) , during a symbol period [12][13][14][15][16][17]. Compared to other CPE algorithms such as the block-average (BA) and the Viterbi-Viterbi (VV) methods [7,9,14], differential phase estimation does not require any computational operations of n-power, averaging, and phase unwrapping, and can thus be efficiently implemented in the field-programmable gate array (FPGA) hardware [17]. In the following sections, we will investigate the BER performance in the differential carrier phase estimation considering the impact of EEPN, and our study can be employed as the benchmark and reference for evaluating the effects of EEPN in other CPE methods.…”
Section: Differential Carrier Phase Estimation In Coherent Transmissimentioning
confidence: 99%
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“…Let us now suppose to filter the discrete 2-D signal with a 2-D filter with impulse response , . 8 The output of this fractionally spaced FFE is (8) Assuming now that is known, since from (3) and (5)…”
Section: A Two-dimensional Fractionally-spaced Ffementioning
confidence: 99%