Asymmetric digital subscriber line methods suitable for long subscriber loops

A method for transmitting asymmetric digital subscriber loop communications including a first communication within a first frequency range and a second communication within a second frequency range over a subscriber loop including a first communication line and a second communication line, said first communication line and said second communication line connecting a first loop end to a second loop end, comprising:

• splitting the subscriber loop at an intermediate point between said first loop end and said second loop end to provide a first gap in said first communication line and a second gap in said second communication line;
• deploying a first load coil in series with said first communication line at the first gap and a second load coil in series with said second communication line at the second gap;
• coupling a repeater circuit to said subscriber loop in a parallel relationship across said first load coil and said second load coil, said repeater circuit including a first amplification interface coupled to said first communication line and a second amplification interface coupled to said second communication line;
• adjusting said first amplification interface to pump downstream data in a first direction from said first loop end to said second loop end over said first communication line while providing a first gain adjustment, based on a first direction attenuation of said first communication by a first direction impedance of said subscriber loop;
• and
• adjusting said second amplification interface to pump upstream data in a second direction from said second loop end to said first loop end over said second communication line while providing a second gain adjustment based on a second direction attenuation of said second communication by a second direction impedance of said subscriber loop, wherein
• adjusting said first amplification interface includes using a first weighting network, said first weighting network having a first filter bank including a first plurality of filters, each of said first plurality of filters having a filter length longer than a sample size, said first weighting network deployed to pump downstream data in said first direction while providing said first gain adjustment, and
• adjusting said second amplification interface includes using a second weighting network, said second weighting network having a second filter bank including a second plurality of filters, each of said second plurality of filters having said filter length longer than said sample size, said second weighting network deployed to pump upstream data in said second direction while providing said second gain adjustment.