Patent ID: 8848504

Claim:
A method for performing alien noise reduction, the method comprising: receiving DSL data from the upstream ends of a plurality of DSL lines coupled to a line card set in a central office (CO), the line card set comprising one or more DSL line cards; converting the received DSL data to frequency domain DSL data in the line card set; transmitting the frequency domain DSL data from the line card set to a vectoring chip set comprising one or more DSL vectoring chips; generating vectoring chip data by performing self far-end crosstalk (self-FEXT) cancellation on the frequency domain DSL data in the vectoring chip set for an active DSL line group comprising the plurality of DSL lines, the active DSL line group comprising distinct DSL line sets comprising: a donor DSL line set comprising one or more donor DSL lines; and a receptor DSL line set comprising one or more receptor DSL lines; transmitting the vectoring chip data to the line card set; generating slicer errors in the line card set for the donor DSL line set vectoring chip data; and performing alien noise reduction in the line card set on the receptor DSL line set vectoring chip data using the generated slicer errors.