1. A method implemented in a vectored system for improving a signal-to-noise ratio (SNR) of a far end transmitted signal on a victim line in the system, comprising: mitigating, by the vectored system, self-induced far-end crosstalk (self-FEXT) on the victim line based on self-FEXT mitigation coefficients; receiving, by a second sensor, information relating to at least one of: self-FEXT of the vectored system, external noise, and the far end transmitted signal; learning, at the second sensor, coefficients relating to self-FEXT coupling into the second sensor; removing self-FEXT from the second sensor based on the learned coefficients; upon removal of self-FEXT from the second sensor, learning a linear combiner configured to combine information relating to the victim line and the second line; applying the learned linear combiner; and readjusting the self-FEXT mitigation coefficients to remove any residual self-FEXT on the victim line after application of the learned linear combiner.