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US 6,687,292 B1Granted
Timing phase acquisition method and device for telecommunications systems
AssigneeTexas Instruments Incorporated
InventorDomingo G. Garcia
Life of this patent
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Abstract
A timing phase acquisition method and device for burst modems includes an receiver designed to initialize an equalizer filter by matching clock of the equalizer filter of the receiver with the phase of the received signal.
Claims5
A method for determining timing phase of a digital signal and for initializing a receiver, comprising:
- detecting a burst message preamble of the digital signal,
- choosing a desired symbol point,
- calculating a desired angle of the desired symbol point,
- sampling an output signal from an in-phase equalizer and a quadrature equalizer to form a subset of the preamble,
- choosing a selected output pair from the subset,
- calculating an output angle of the selected output pair,
- comparing the desired angle with the output angle to obtain an angle difference, and
- implementing a delay for the in-phase equalizer and quadrature equalizer based on the angle difference.
5 more elements
A timing phase acquisition and initialization device for determining timing phase of a digital signal and for initializing a receiver, comprising:
- an equalizer for processing said digital signal,
- a filter buffer for storing a plurality of equalizer coefficients to be applied to said equalizer, and
- a buffer manager for detecting a burst message preamble of the digital, choosing a desired symbol point, calculating a desired angle of the desired symbol point, sampling an output signal from an in-phase equalizer and a quadrature equalizer to form a subset of the preamble, choosing a selected output pair from the subset, calculating an output angle of the selected output pair, comparing the desired angle with the output angle to obtain an angle difference, and implementing a delay for the in-phase equalizer and quadrature equalizer based on the angle difference.
Dependencies are inferred from the claim text.