Patent ID: 9100094
Filing Date: 2015-08-04
Classification: H04L

Abstract:
1. A method, comprising: receiving, by a receiver circuit, an offset correction pattern transmitted over a serial link; sampling the received offset correction pattern based on an offset correction parameter to generate a sampled signal; computing a distribution of the sampled signal; setting the offset correction parameter based on the distribution; receiving, by the receiver circuit, a frequency compensation calibration pattern transmitted over the serial link; processing the received frequency compensation calibration pattern based on a frequency compensation parameter to generate a compensated signal; sampling the compensated signal to generate a sampled compensated signal; computing a second distribution of the sampled compensated signal; determining that the second distribution does not represent a correct ratio of binary values according to the frequency compensation calibration pattern, wherein the compensated signal is overequalized when the second distribution represents a ratio of ones to zeros that is greater than the correct ratio of binary values; and setting the frequency compensation parameter based on the second distribution and the correct ratio.