Patent ID: 9137056
Filing Date: 2015-09-15
Classification: H04L

Abstract:
1. A computer-implemented method, comprising: receiving a non-pre-equalized signal at an upstream receiver; identifying equalization coefficients associated with the non-pre-equalized signal; determining the extent of upstream channel impairments encountered by the non-pre-equalized signal based upon the identified equalization coefficients; determining a number of equalizer taps to be used at the upstream receiver, wherein the number of equalizer taps is based upon the extent of upstream channel impairments encountered by the non-pre-equalized signal; after receiving the non-pre-equalized signal, receiving a pre-equalized signal at the upstream receiver; identifying pre-equalization coefficients associated with the pre-equalized signal, wherein the pre-equalization coefficients comprise a pre-equalization coefficient associated with a main pre-equalizer tap and one or more pre-equalization coefficients associated with one or more non-main pre-equalizer taps; determining a tap equalization ratio for each respective one of the one or more non-main pre-equalizer taps, wherein the tap equalization ratio for each respective non-main pre-equalizer tap is equivalent to the ratio of the pre-equalization coefficient associated with the main pre-equalizer tap to the pre-equalization coefficient associated with the respective non-main pre-equalizer tap; comparing the tap equalization ratio associated with each respective one of the one or more non-main pre-equalizer taps to a predetermined threshold; and enabling the respective non-main pre-equalizer tap based on the comparison between the tap equalization ratio associated with the respective non-main pre-equalizer tap and the predetermined threshold.