Sampling phase extracting circuit

Details Sampling phase extracting circuit Sampling phase extracting circuit

1993-09-13

1995-09-12

Chin, Stephen

Pulse or digital communications

Synchronizers

Synchronizing the sampling time of digital data

375371, H04L 700

Patent

active

054504570

ABSTRACT:
Correlation signals between the residual intersymbol interference, which is the difference signal between the input and output signals of the decision circuit, and the result of decision is cumulatively added by an integrator. The result of the integration is sampled by a sampler at every NT. A phase control circuit, whose input is the difference signal between the sampled signal and the previous integration result, adaptively controls the phase renewal quantity during training in accordance with the codes of the aforementioned two input signals. The above-described configuration makes it possible to reduce the convergence time of the decision feedback equalizer to about 1/2 of that taken by the conventional process, and manifests a significant effect in satisfying the requirement for the warm start in training, prescribed for the set-up mode of the system.

REFERENCES:
patent: 5247544 (1993-09-01), LaRosa et al.

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