Patent ID: 7177378

Claim:
Method to minimize error contributions in a Discrete Multitone Modulation transmission system comprising a transmitter and a receiver, the receiver comprising a time domain equalizer (TEQ) represented by a TEQ vector, where a received DMT-signal is affected by intersymbol interference, intercarrier interference and additive noise, comprising the following steps: calculating additive noise average power of the received DMT-signal; calculating intersymbol interference average power of the received DMT-signal; calculating intercarrier interference average power ( P ICI = ∑ k ∈ k u ⁢ q T ⁢ H T ⁢ E ⁢ { X ICI k T ⁢ r k * ⁢ r k T ⁢ X ICI k } ⁢ Hq ) of the received DMT-signal; calculating a cost function by adding the intersymbol interference average power, the intercarrier interference average power, and the additive noise average power; introducing a constraint which avoids a trivial solution where the TEQ vector is equal to zero; minimizing the cost function by optimizing the TEQ vector.