Patent ID: 7272177

Claim:
A feed-forward equalizer (FFE) of a communication system comprising: an adaptive filter for filtering a receiving signal according to a transfer function including a plurality of parameters to eliminate a pre-cursor inter-symbol interference (pre-ISI) of the receiving signal, the adaptive filter comprising: a plurality of delay elements for generating a plurality of delay signals according to the receiving signal; a plurality of multiplier for respectively multiplying the receiving signal and the delay signals by the parameters and thereby generating a plurality of multiplied signals, wherein at least one of the parameters remains fixed while the other parameters are adjusted to converged values, so as to accelerate the convergence of the communication system; and a summing circuit for summing the multiplied signals to generate a filtered receiving signal; and a digital auto-gain controller (DAGC) coupled to the adaptive filter for adjusting the magnitude of the filtered receiving signal according to the transfer function; wherein a center multiplier among the multipliers is designated to multiply one of the delay signals by the fixed parameter to generate one of the multiplied signals.