Synchronizing clocks across a communication link

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United States of America Patent

PATENT NO 7907640
APP PUB NO 20090279652A1
SERIAL NO

12508431

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A slave clock may be synchronized to a master clock by means of a synchronization signal sent from the master to the slave clock side of the link. The synchronization signal may be an expected signal pattern sent at intervals expected by the slave side. The slave clock may correlate received signals with a representation of the expected synchronization signal to produce a correlation sample sequence at a first sample rate which is related as n times the slave clock rate. A best interpolation may in turn be further refined by estimating between interpolator outputs adjacent to the best interpolation output. The synchronization signal receipt time thus determined is compared to the expected time based upon the slave clock, which is adjusted until the times match. The best interpolation may in turn be further refined by estimating between interpolator outputs adjacent to the best interpolation output.

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Patent Owner(s)

Patent OwnerAddress
WI-LAN INC1891 ROBERTSON ROAD SUITE 100 OTTAWA K2H 5B7

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akler, Sharon Kfar-Saba, IL 4 270
Arviv, Eli Modiein, IL 15 273
Bourlas, Yair San Diego, US 79 2332
Gallagher, Timothy Leo Encinitas, US 23 385
Gilbert, Sheldon L San Diego, US 42 2540
Pollmann, Stephen C Santee, US 9 465
Price, Frederick W Carlsbad, US 13 285
Readler, Blaine C San Diego, US 10 369
Sinha, Pranesh San Diego, US 11 398
Wiss, John Carlsbad, US 5 297

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