Low-Complexity Linewidth-Tolerant Carrier Phase Estimation for 64-QAM Systems Based on Constellation Transformation

A novel three-stage digital feed-forward carrier recovery algorithm based on the transformation of 64-QAM constellation into QPSK is proposed. For 1 dB penalty at BER=10-2, it can tolerate a linewidth-times-symbol-rate product of 4.5·10-5, making it possible to operate 32-Gbaud optical 64-QAM system...

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Bibliographic Details
Main Authors: Bilal, S.M, Bosco, G, Poggiolini, P, Fludger, C.R.S
Format: Conference Proceeding
Language:English
Subjects:
Markov processes
Multiplexing and switching in optical communication
Online Access:Get full text
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Summary:A novel three-stage digital feed-forward carrier recovery algorithm based on the transformation of 64-QAM constellation into QPSK is proposed. For 1 dB penalty at BER=10-2, it can tolerate a linewidth-times-symbol-rate product of 4.5·10-5, making it possible to operate 32-Gbaud optical 64-QAM systems with current commercial tunable lasers.
DOI:10.1049/cp.2013.1595