Receiver with tap-coefficient adjustments

摘要

A receiver can include a sampler module for sampling a data-bearing input signal to extract data encoded in the data-bearing analog input signal. The sampling results in data-symbol sequences. The data-symbol sequences can be used to identify error events. The identified error events can be used as a basis for adjusting tap coefficients. The tap coefficients can be used in setting reference levels for the sampler module.

主权项

1. A process comprising:
sampling, using plural samplers, an analog data input signal to yield respective data-symbol sequences, said data-symbol sequences including an output data-symbol sequence that is output from a receiver; identifying, by comparing symbols across said data-symbol sequences generated by said sampling, sampling events including error events in said data-symbol sequences; adjusting tap coefficients of a decision feedback equalizer based on said error events; and setting reference levels for said plural samplers based in part on said tap coefficients, said setting including setting a reference level used by a sampler to yield said output data-symbol sequence, the setting including,
generating an equalization signal as a sum of products of the tap coefficients and data-symbol values of the data-symbol sequences; andapplying a first bias to said equalization signal to yield a first of the reference signals, and a second bias or no bias to the equalization signal to yield a second reference signal offset with respect to the first reference signal.