Patent ID: 7054359

Claim:
A pre-equalizer comprising: a signal adder; at least one adaptive filter coupled to the signal adder, an input to the pre-equalizer, and an output from the pre-equalizer, the at least one adaptive filter operating on one of an input signal to the pre-equalizer, or an output signal from the pre-equalizer and generating a signal which is added by the signal adder to the input signal, said adaptive filter having a feed-forward filter coupled between the signal adder and the output from the pre-equalizer and a feedback filter coupled within a feedback loop between the output from the pre-equalizer and the signal adder, where the pre-equalizer is an auto-regressive moving average filter; wherein adaptation of the at least one adaptive filter is derived by minimizing an output energy cost function defined for the pre-equalizer, and wherein the pre-equalizer generates an equalized output signal from the input signal for transmission to an equalizer performing channel equalization.