Minimum variance carrier recovery with increased phase noise tolerance

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United States of America Patent

PATENT NO 10396902
APP PUB NO 20170005734A1
SERIAL NO

15268746

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Abstract

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A method of data symbol recovery in a coherent receiver of an optical communications system includes processing data symbol estimates detected from a received optical signal, and determining recovered symbol values from the processed data symbol estimates. The recovered symbol values belong to a symbol constellation having a predetermined asymmetry. Processing the data symbol estimates compensates phase noise that is greater than one decision region of the symbol constellation. A coherent receiver of an optical communications system includes a module configured to process data symbol estimates detected from a received optical signal and a decision circuit configured to determine recovered symbol values from the processed data symbol estimates. The recovered symbol values belong to a symbol constellation having a predetermined asymmetry. Processing the data symbol estimates compensates phase noise that is greater than one decision region of the symbol constellation.

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Patent Owner(s)

  • CIENA CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ghasemi, Akbar Kanata, CA 8 53
Khandani, Amir Kitchener, CA 26 467
Oveis, Gharan Shahab Nepean, CA 61 499
Roberts, Kim B Ottawa, CA 157 2942
Taherzadehboroujeni, Mahmoud Ottawa, CA 19 274

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