Receiver with decision-directed equalizer

Details Receiver with decision-directed equalizer Receiver with decision-directed equalizer

2006-03-28

2009-11-10

Tran, Khai (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S229000, C333S02800T

Reexamination Certificate

active

07616684

ABSTRACT:
A circuit is configured to receive and process a signal that includes in-phase and out-of-phase components that correspond to in-phase and out-of-phase components of a time sequence of symbols. A phase sensor in the circuit is configured to determine a phase value in accordance with an equalized version of the in-phase component of the signal and the in-phase component of the time sequence of symbols. The phase sensor is further configured to generate an approximation to the out-of-phase component of the signal in accordance with a Hilbert function of order k greater than 1. Terms in the approximation that correspond to future samples of the in-phase component of the signal are replaced with terms that correspond to past samples of an error that corresponds to a difference between samples of the in-phase component of the signal and an output from a detector.

REFERENCES:
patent: 5533070 (1996-07-01), Krishnamurthy et al.
patent: 6535553 (2003-03-01), Limberg et al.
patent: 7236757 (2007-06-01), Raghavan et al.
patent: WO 00/27066 (2000-05-01), None
International Search Report for International Application No. PCT/US2006/012348, mailed Aug. 3, 2006.

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