Minimum variance carrier recovery
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United States of America Patent
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Jan 6, 2015
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app pub date -
Oct 5, 2011
filing date -
Oct 5, 2011
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Abstract
Methods and systems of data symbol recovery in a coherent optical receiver of an optical communications system. A respective probabilistic phase error is calculated for each of a plurality of data symbol estimates. A phase rotation is calculated based on the probabilistic phase error estimates, using a filter function, and the phase rotation applied to at least one data symbol estimate to generate a corresponding rotated symbol estimate. Each rotated symbol estimate is processed to generate corresponding decision values of each data symbol.
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