H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/203, 340/205
H04L 7/00 (2006.01) H04L 7/04 (2006.01) H04L 25/03 (2006.01) H04L 27/233 (2006.01) H04L 7/027 (2006.01)
Patent
CA 1167947
METHOD AND DEVICE FOR EFFECTING THE INITIAL ADJUSTMENT OF THE CLOCK IN A SYNCHRONOUS DATA RECEIVER Abstract In a synchronous data receiver that includes a clock and an adaptive equalizer, a method and a device for effecting the initital adjustment of the clock during a turn-on period in the course of which the re- ceiver is supplied with a known clock synchronization signal followed by a known equalizer training sequence. In accordance with the method of invention, the incoming signal is sampled and the samples so obtained are stored in a storage means. The synchronization signal and the beginning of the training sequence are successively de- tected. When the beginning of the training sequence is detected, the storage locations for the samples of the received synchronization signal are known and a control signal controlling the initital adjustment of the clock is derived from these samples, which are stored in pre- determined locations in the storage means. In a pre- ferred embodiment of the invention, said control signal is derived from the samples that precede the G samples immediately followed by the beginning of the training sequence, the value of G being such that those samples which are in the vicinity of the transition region be- tween the synchronization signal and the training se- quence will not be used. FR9-79-022
371771
Godard Dominique N.
Quintin Michel Y.
Barrett B.p.
International Business Machines Corporation
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