Patent Document ID: 20080310562
Application ID: 11762982
Patent Flag: 0

Claim One:
1. A method for determining an impairment correlation between first and second sample streams associated with a received signal, the method comprising: storing pre-computed values in a look-up table; determining two or more partial impairment correlations based on respective pre-computed values selected from the look-up table; and combining the partial impairment correlations to generate a final impairment correlation between the first and second sample streams, wherein determining each of the two or more partial impairment correlations comprises: computing an index value as a function of a difference between first and second delay offsets corresponding to the respective first and second sample streams; selecting a pre-computed value from the look-up table based on the index value; generating a pulse correlation estimate based on the selected pre-computed value; and determining the partial impairment correlation based on the pulse correlation estimate.