Decision-directed control circuit

Details Decision-directed control circuit Decision-directed control circuit

H - Electricity

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H04B 7/10 (2006.01) H04B 3/14 (2006.01) H04B 7/00 (2006.01) H04L 7/02 (2006.01) H04L 25/03 (2006.01) H04L 25/06 (2006.01) H04L 27/06 (2006.01) H04L 27/38 (2006.01)

Patent

CA 1293534

IMPROVED DECISION-DIRECTED CONTROL CIRCUIT Abstract An improved decision-directed control circuit is disclosed which supplies adjustments to adaptive circuitry in a communications system. The improvement is achieved by only supplying adjustments when there is a high probability that the adjustment is correct. In the disclosed embodiments, this high probability equates, at a minimum, to times when the adaptive circuit output has an amplitude which lies outside of a range extending from the largest to the smallest value of the digital signal. This adjustment approach can be used to adjust a variety of adaptive circuits including transversal equalizers, timing recovery circuits, cross-polarization cancellers and carrier recovery circuits.

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