Patent ID: 7586998
Filing Date: 2009-09-08
Classification: H04L

Abstract:
1. A method for measuring a value of a pulse response at a receiver of a data transmission system, comprising: initializing a first pattern to match to any symbol for all elements of the first pattern to match; initializing a second pattern to match any symbol for all elements of the second pattern to match; adjusting the first pattern to match by replacing a first entry in the first pattern to match with a one value and replacing a second entry in the first pattern to match with a predetermined symbol; adjusting the second pattern to match by replacing a first entry in the second pattern to match with a one value and replacing a second entry in the second pattern to match with a predetermined symbol; supplying a received signal to a data slicer and an error slicer; masking for a first subset of data slicer values, adjusting the error slicer threshold to a first average signal level of the first subset; masking for a second subset of data slicer values, adjusting the error slicer threshold to a second average signal level of the second subset; and determining the value of the pulse response from the first and second average signal levels based on the masked first subset of data slicer values and the masked second subset of data slicer values.