Patent ID: 7149268

Claim:
A device for equalizing a transmit spectrum in a transmitter using a multiple-carrier modulation scheme, the system comprising: a multiple-carrier transmitter configured to generate a plurality of transmit carrier tones and apply a gain scalar to at least one of the transmit carrier tones, and further configured to modulate the plurality of transmit carrier tones, producing a modulated signal; a multiple-carrier receiver comprising: a receive line driver configured to receive the modulated signal from a local output of the transmitter; a tone transform element configured to separate the modulated signal into a plurality of received carrier tones; and a gain calculation element configured to calculate at least a portion of the gain scalar applied by the transmitter to at least one of the plurality of transmit carrier tones, the gain scalar based on a predefined transmit signal spectrum associated with the at least one transmit carrier tone and on a measurement of at least one of the plurality of received carrier tones, the measurement corresponding to at least one of a power measurement or an amplitude measurement.