Patent ID: 7545886
Filing Date: 2009-06-09
Classification: H04L

Abstract:
1. A method for adapting a receiver of a data transmission system which uses only two slicers to determine an eye opening, comprising: supplying a signal to a single data slicer to compare the signal to the data slicer's fixed threshold for identifying symbols in a data transmission stream; supplying the signal to a single auxiliary slicer to compare the signal to the auxiliary slicer's adjustable threshold for identifying an eye opening size for the signal; determining a first eye opening size by adjusting the auxiliary slicer's threshold towards an upper edge and a lower edge of a first eye opening as a result of comparisons between the auxiliary slicer's output and the data slicer's output; and performing a first adjustment, in a first direction, to a first parameter of the receiver; determining a second eye opening size, as a result of the first adjustment, by adjusting the auxiliary slicer's threshold towards an upper edge and a lower edge of a second eye opening as a result of comparisons between the auxiliary slicer's output and the data slicer's output; comparing the first eye opening size to the second eye opening size to obtain a comparison result; and performing a second adjustment to the first parameter of the receiver in a direction dependent upon the comparison result.