Patent ID: 8824264

Claim:
A method for channel estimating, comprising: loading, by a first device, over a line of a plurality of lines, a combination of signals sent on other lines of the plurality of lines, wherein the combination of signals is obtained based on the signals sent on the other lines of the plurality of lines and their respective coefficients of the other lines; measuring, by a second device, a signal-to-noise ratio (SNR) of the loaded line; calculating, by the first device, crosstalk channels of the loaded line according to the coefficients of the other lines and the measured SNR, wherein the step of loading a combination of signals sent on other lines of the plurality of lines comprises obtaining a product of the combination of signals sent on the other lines and a value indicating a step size, and loading, over the line of the plurality of lines, the product of the combination of signals sent on the other lines and the step size value, wherein the step size value is calculated according to a transmit power of each line and an SNR of the line before being loaded.