Method and apparatus for DMT crosstalk cancellation

A method for precoding multi-tone modulated transmissions over bundled subscriber lines, comprising:

• detecting a victim channel and an interferer channel having non-matching symbol rates and non-matching numbers of samples;
• transforming the interferor channel into a pseudo-symbol having both a substantially similar length as a corresponding symbol of the victim channel together with defined tonal characteristics expressed in terms of the interferor channel;
• assigning crosstalk coefficients to selected sub-channels or tones of the pseudo symbol;
• and
• precoding the victim channel with the pseudo symbol using the crosstalk coefficients assigned in the assigning act;
• thereby generating a precoded victim symbol which exhibits reduced crosstalk between the selected victim and interferor.

A means for precoding multi-tone modulated transmissions over bundled subscriber lines, comprising:

• means for detecting a victim channel and an interferor channel having non-matching symbol rates and non-matching numbers of samples;
• means for transforming the interferor channel into a pseudo-symbol having both a substantially similar length as a corresponding symbol of the victim channel together with defined tonal characteristics expressed in terms of the interferor channel;
• means for assigning crosstalk coefficients to selected sub-channels or tones of the pseudo symbol;
• and
• means for precoding the victim channel with the pseudo symbol using the crosstalk coefficients assigned in the assigning act;
• thereby generating a precoded victim symbol which exhibits reduced crosstalk between the selected victim and interferor.