Patent ID: 7394752

Claim:
A method of removing crosstalk from a primary signal sent over a primary channel in a synchronized time division duplexed (TDD) digital subscriber line (DSL) system comprising a near-end crosstalk (NEXT) generating channel that generates NEXT interference in the primary signal and further comprising a far-end crosstalk (FEXT) generating channel that generates FEXT interference in the primary signal, the method comprising: acquiring signal data, wherein the signal data comprises; received signal data for the primary channel and the FEXT generating channel; transmitted signal data for the NEXT generating channel; channel data comprising channel transfer function data and crosstalk coupling coefficient data for the primary channel, the NEXT generating channel and the FEXT generating channel; removing NEXT interference in the primary signal using the transmitted signal data and the channel data; and removing FEXT interference in the primary signal using vectored discrete multitone (DMT) FEXT removal the received signal data and the channel data, wherein the vectored DMT FEXT removal includes, organizing the channel data for the FEXT generating channel and the primary channel into a FEXT data matrix, calculating a decomposition based on the FEXT data matrix, and calculating a primary signal estimate that is an estimate of the primary signal.