Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 22, Issue 14, Pages 1051-1053Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2010.2049644
Keywords
Coherent receiver; feed-forward; modulation format; optical; phase recovery; quadrature amplitude modulation (QAM)
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An improved feed-forward carrier phase recovery method is proposed for coherent receivers using-ary quadrature amplitude modulation-based modulation formats. It is shown that by introducing multiple cascaded feed-forward carrier recovery stages, the required compute power can be significantly reduced compared to the prior art using the single-stage-based blind phase search method.
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