Maximum likelihood decoding
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United States of America Patent
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May 9, 2017
Issued Date -
N/A
app pub date -
Mar 23, 2016
filing date -
Oct 31, 2012
priority date (Note) -
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Abstract
In a coherent receiver of an optical communication system, a method of processing a detected symbol estimate to determine a most likely value of a corresponding transmitted data word, the transmitted data word comprising one or more data bits encoded in a transmitter using a predetermined constellation of at least two symbols. A set of two or more virtual constellation points are define in a decision region corresponding to a possible value of the data word. The detected symbol estimate is processed to find a most likely virtual constellation point given the detected symbol estimate. The most likely value of the corresponding transmitted data word is determined based on the most likely virtual constellation point.
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