Patent ID: 6975694

Claim:
An system for equalizing a discrete multi-tone (DMT) transmit spectrum, comprising: a DMT transmitter configured to generate a plurality of transmit carrier tones and apply a gain to each transmit carrier tone and combine the plurality of transmit carrier tones into a symbol and transmit the symbol; and a DMT receiver comprising: a receive line driver configured to receive the output of the DMT transmitter and to detect the transmitted symbol; a discrete Fourier transform (DFT) element configured to separate the detected symbol into a plurality of received carrier tones; and a gain calculation element configured to calculate at least a portion of the gain applied by the DMT transmitter to each of the plurality of transmit carrier tones, the gain based on a predefined transmit signal spectrum associated with each of the plurality of transmit carrier tones and on a power measurement of each of the received carrier tones.