Patent ID: 9699006
Date: 2017-07-04
CPC Classifications: H04L

Claim:
1. A method of filter pattern selection, the method comprising: defining a set of initial values for a set of filter pattern pairs, wherein the set of initial values define a plurality of filter pattern combinations for each filter pattern in the set of filter pattern pairs; measuring (a) a first average sign value of aggregate inter-symbol interference (ISI) for a first data sequence using a first plurality of filter pattern combinations of a first filter pattern, and (b) a second average sign value of aggregate ISI for a second data sequence using a second plurality of filter pattern combinations of a second filter pattern, wherein the first filter pattern and the second filter pattern comprise a first filter pattern pair; estimating (a) a first analog level of aggregate ISI for the first filter pattern based on the first average sign value, and (b) a second analog level of aggregate ISI for the second filter pattern based on the second average sign value; estimating an analog level of individual ISI of the first filter pattern pair based on the first analog level of aggregate ISI for the first filter pattern and the second analog level of aggregate ISI for the second filter pattern; estimating, for each possible filter pattern combination, an analog level of aggregate ISI for the first filter pattern pair; and selecting a filter pattern combination to be used with the first filter pattern pair to reduce the analog level of aggregate ISI for the first filter pattern pair.