Switchable hybrid design for asymmetric digital subscriber line

A method of implementing an adaptive hybrid network for an asymmetric digital subscriber line, the method comprising the steps of:

• dividing a plurality of subscriber loops into a desired number ‘C’ of classes;
• defining hybrid performance goals for each desired class;
• defining a cost function associated with the hybrid performance goals;
• determining an index corresponding with the largest cost function for each desired class such that a subscriber loop associated with its respective index is assigned to its desired class along with a desired number of closest loops;
• implementing a linear combination of corresponding echo transfer functions for each loop associated with each class;
• weighting the linear combination according to relative importance among each loop within each class, such that a target transfer function is formed as the center of mass of the loops associated with each respective class;
• and
• approximating each target transfer function with a linear system capable of being synthesized in hardware.