Maximizing the channel capacity of multicarrier transmission by suitable adaptation of the time-domain equalizer

An adaptation algorithm for determining the time-domain equalizer coefficients is described that maximizes the total channel capacity for all carriers of a multitone (discrete multitone) transmission. It takes into account the crosstalk noise environment and the interblock interference as a common disturbance. Furthermore, the leakage effect of the discrete Fourier transform (fast Fourier transform) is considered, too. Including this into the algorithm for the equalizer coefficients leads to a notable improvement in the signal-to-noise ratio, especially at lower frequencies for a typical asymmetrical digital subscriber line application