Tracking of sampling phase in a receiver device
AssigneeMarvell Asia Pte Ltd
InventorsBasel ALNABULSI, Yu LIAO, Benjamin SMITH, Jamal RIANI
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Abstract
An input signal is sampled at a current sampling phase by a sampler device of a receiver device. The sampled input signal is equalized by an adaptive equalizer of the receiver device. One or more parameters of the adaptive equalizer are adapted, based on the equalized input signal, under one or more adaptation constraints. Phase gradient information indicative of an offset of the current sampling phase from an optimal sampling phase is determined, and the one or more adaptation constraints of the adaptive equalizer are updated based on the phase gradient information to move the current sampling phase towards the optimal sampling phase.
Claims20
A method for tracking a sampling phase in a receiver device, the method comprising:
- receiving an input signal at the receiver device;
- sampling, by the receiver device, the input signal to generate a sampled input signal, the input signal sampled at a current sampling phase corresponding to a sampling clock;
- equalizing, by the receiver device, the sampled input signal to generate an equalized input signal;
- determining, by the receiver device based at least in part on the equalized input signal, phase gradient information indicative of a phase offset of the current sampling phase from an optimal sampling phase for the input signal, the optimal sampling phase corresponding to an estimated peak of the input signal;
- and
- applying, by the receiver device the phase gradient information to reduce the phase offset for a subsequent sampling operation.
A receiver device, comprising:
- front end circuitry configured to receive an input signal;
- a sampler device configured to sample the input signal at a current sampling phase to generate a sampled input signal;
- an adaptive equalizer configured to equalize the sampled input signal to generate an equalized input signal;
- and
- a controller configured to:
- determine, based at least in part on the equalized input signal, phase gradient information indicative of a phase offset of the current sampling phase from an optimal sampling phase for the input signal, the optimal sampling phase corresponding to an estimated peak of the input signal;
- and
- apply the phase gradient information to reduce the phase offset for a subsequent sampling operation.
Dependencies are inferred from the claim text.