INITIALIZATION OF TIMING RECOVERY AND DECISION-FEEDBACK EQUALIZATION IN A RECEIVER
First Claim
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1. A method of initializing a receiver, the method comprising:
- during an initialization mode, repeatedly selecting timing offset values for a timing recovery circuit;
for each selected timing offset value;
performing timing recovery using the timing offset value;
repeatedly selecting groups of weights for a decision feedback equalizer;
using each selected group of weights to perform blind decision feedback equalization; and
for each selected group of weights, computing a metric indicating data reception quality; and
choosing a timing offset value and a group of weights based on the computed metrics.
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Abstract
A method of initializing a receiver is performed during an initialization mode. Timing offset values for a timing recovery circuit are repeatedly selected. For each selected timing offset value, timing recovery is performed using the timing offset value and groups of weights for a decision feedback equalizer are repeatedly selected. Each selected group of weights is used to perform blind decision feedback equalization. For each selected group of weights, a metric indicating data reception quality is computed. A timing offset value and a group of weights are chosen based on the computed metrics.
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Citations
36 Claims
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1. A method of initializing a receiver, the method comprising:
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during an initialization mode, repeatedly selecting timing offset values for a timing recovery circuit; for each selected timing offset value; performing timing recovery using the timing offset value; repeatedly selecting groups of weights for a decision feedback equalizer; using each selected group of weights to perform blind decision feedback equalization; and for each selected group of weights, computing a metric indicating data reception quality; and choosing a timing offset value and a group of weights based on the computed metrics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A receiver, comprising:
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an analog-to-digital converter (ADC) to sample a received signal; a decision-feedback equalizer (DFE) to equalize the sampled signal; a timing recovery circuit to provide a timing offset to the ADC; and a controller to select between an initialization mode of operation and a normal mode of operation, wherein in the initialization mode the controller is to repeatedly select timing offset values for the timing recovery circuit in a first loop and to repeatedly select groups of weights for the DFE in a second loop nested within the first loop. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor in a modem during an initialization mode, cause the modem to:
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repeatedly select timing offset values for a timing recovery circuit; for each selected timing offset value; perform timing recovery using the timing offset value; repeatedly select groups of weights for a decision feedback equalizer; use each selected group of weights to perform blind decision feedback equalization; and for each selected group of weights, compute a metric indicating data reception quality; and choose a timing offset value and group of weights based on the computed metrics. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36-42. -42. (canceled)
Specification