Signal framing in a coherent optical receiver
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United States of America Patent
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Dec 9, 2014
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app pub date -
May 21, 2013
filing date -
Oct 21, 2005
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Abstract
A method and system for a estimating a most likely location of a periodic SYNC burst within an optical signal received through an optical communications system. A cross-correlation is calculated between a multi-bit digital signal derived from the optical signal and a known symbol sequence of the SYNC burst. The cross-correlation is processed in at least one sub-block to identify a candidate sub-block in which the SYNC burst is most likely located. The candidate sub-block is then further analyzed to estimate a location of the SYCN burst.
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