Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2008-05-13
2008-05-13
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Receivers
Automatic gain control
C375S265000, C714S795000
Reexamination Certificate
active
07372924
ABSTRACT:
A decision-driven control loop wherein a first reconstructed signal is compared to an unreconstructed data symbol signal to initially drive the control loop. A second reconstructed signal that is based on a longer memory path than the first reconstructed signal is evaluated against the first reconstructed signal. The decision-driven control loop is ultimately controlled based on the results of the evaluation between the first and second reconstructed signals. The inventive decision-driven control loop, which may be implemented in software, may form part of a read channel in a storage device.
REFERENCES:
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patent: 7107514 (2006-09-01), Oberg et al.
patent: 7213196 (2007-05-01), Allen et al.
Boyle, “A catastrophic error mode in adaptive predictive DIR equalisation of dynamic channels” 2001 IEEE Workshop on Signal Processing Systems, Sep. 26-28, 2001 pp. 177-184.
He Runsheng
Madden Michael
Oberg Mats
Ghayour Mohammed
Marvell International Limited
Torres Juan Alberto
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