Activation method in data transceivers
AssigneeIntel Corporation
InventorsJames Ward Girardeau, Jr., Hiroshi Takatori
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Abstract
An activation method for an adaptive equalization in a data transceiver having at least one adaptive filter for adaptive equalization of received sample signals, includes pre-loading a fixed set of coefficients on the at least one adaptive filter in initial activation of the data transceiver. The pre-loaded adaptive filter is allowed to adapt immediately after the activation of the data transceiver. Alternatively, the pre-loaded adaptive filter is allowed to adapt after the activation of the data transceiver and a period of time thereafter. The received timing and/or signals are recovered.
Claims27
An activation method for adaptive equalization of received signals in a data transceiver having a plurality of adaptive filters, comprising:
- pre-loading a fixed set of coefficients on at least one of the plurality of adaptive filters to partially equalize the received signals;
- adapting at least one of the remaining adaptive filters with the partially equalized received signals such that the data transceiver obtains initial activation;
- and
- adapting the at least one pre-loaded adaptive filter after initial activation of the data transceiver has been obtained.
A method of adaptive equalizing received signals in a data transceiver having a plurality of adaptive filters, comprising:
- pre-loading a fixed set of coefficients on at least one of the adaptive filters to partially equalize the received signals;
- adapting at least one of the remaining adaptive filters with the partially equalized received signals such that the data transceiver obtains initial activation;
- and
- adapting the plurality of adaptive filters including the at least one pre-loaded adaptive filter after the data transceiver obtains initial activation to recover the received signals.
A data transceiver for adaptive equalizing received signals with a pre-sample distortion and a post-sample distortion, comprising:
- an echo canceller (EC) for removing transmit signals from the received signals;
- an automatic gain control (AGC) for optimizing a gain level of the received signals;
- a feed forward equalizer (FFE), coupled to the automatic gain control (AGC), for whitening noise from the received signals and removing the pre-sample distortion;
- a slicer, coupled to the feed forward equalizer (FFE), for recovering the received signals;
- a decision feedback equalizer (DFE), coupled between the slicer and the feed forward equalizer (FFE), for providing feedback signals to the slicer to remove the post-sample distortion;
- and
- means for controllably adapting the FFE, EC, AGC, and DFE such that the data transceiver is readily activated, and the received signals are recovered, said adapting means configured to pre-load at least one of the EC, AGC, FFE, and DFE with a fixed set of coefficients to partially equalize the received signals, adapt at least one of the remaining adaptive filters with the partially equalized received signals such that the data transceiver obtains activation, and adapt the at least one pre-loaded adaptive filter after activation of the data transceiver has been obtained.
A data transceiver for adaptive equalizing received signals, comprising:
- a plurality of adaptive filters, wherein at least one of the plurality of adaptive filters is capable of removing distortions of the received signals;
- and
- means for controllably adapting the at least one adaptive filter such that the data transceiver is readily activated, and the received signals are recovered, said adapting means configured to pre-load the at least one adaptive filter with a fixed set of coefficients to partially equalize the received signals, adapt at least one of the remaining adaptive filters with the partially equalized received signals such that the data transceiver obtains activation, and adapt the at least one pre-loaded adaptive filter after activation of the data transceiver has been obtained.
Dependencies are inferred from the claim text.