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Analysis of Carrier Phase Extraction Methods in 112-Gbit/s NRZ-PDM-QPSK Coherent Transmission System

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We present a comparative analysis on three carrier phase extraction approaches, including a one-tap normalized least mean square method, a block-average method, and a Viterbi-Viterbi method, in coherent transmission system considering equalization enhanced phase noise.

© 2012 Optical Society of America

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