Patent ID: 7526019

Claim:
A system for providing equalization and carrier recovery, comprising: an equalization circuit configured to provide equalization for a signal, the equalization circuit including a slicer having an input and an output, the equalization circuit having a blind operating mode that does not depend upon the output of the slicer and a decision-based operating mode that depends at least in part upon the output of the slicer; and a carrier recovery circuit configured to provide carrier recovery for the signal and evaluate the input and output of the slicer to generate a phase detection error based on the evaluation, the carrier recovery circuit having a polarity-based operating mode and decision-based operating mode; wherein: the equalization circuit and the carrier recovery circuit operate in a concurrent manner to provide equalization and carrier recovery for the signal; the equalization circuit and the carrier recovery circuit are responsive to a set of signals directing one or both of them to switch operating mode depending on a set of conditions relating to the phase detection error wherein the equalization circuit switches operating mode in response to at least one condition in the set of conditions and the carrier recovery circuit switches operating mode in response to at least one condition in the set of conditions; and the set of conditions includes at least one requirement that the absolute value of the phase detection error remain below a predetermined threshold for a predetermined time interval or for a predetermined number of non-zero sampled values of the phase detection signal.