Patent ID: 7843949

Claim:
A method for crosstalk reduction, the method comprising: reducing crosstalk of a group of communication channels electronically and based on crosstalk reduction parameters; changing a composition of the group of communication channels, changing the composition comprising at least one step taken from the group consisting of including at least one additional communication channel to the group, removing at least one communication channel from the group and exchanging at least one communication channel of the group for at least one communication channel not in the group; calculating crosstalk reduction parameters after the change of composition based on crosstalk reduction parameters before the change of composition, calculating comprising calculating a second matrix after the change of composition based on a first matrix defined before the change of composition, the first matrix comprising elements characterizing crosstalk between communication channels in the group of communication channels before the change and the second matrix comprising elements characterizing crosstalk between communication channels in the group of communication channels after the change, wherein calculating the second matrix based on the first matrix comprises subtracting a third matrix based on portions of the first matrix related at least in part to at least one channel to be removed from the group of communication channels from a fourth matrix based on a portion of the first matrix related only to channels remaining in the group of communication channels.