Patent ID: 7974335

Claim:
A decision feedback equalization apparatus comprising: a channel estimating means for estimating a channel on received signal based on the received signal and a training sequence; a channel matched filtering means for maximizing a Signal to Noise Ratio (SNR) from the channel estimated by the channel estimating means to change channel characteristic of the received signal; a noncausal filtering means for approximating the channel changed by the channel matched filtering means from nonminimum phase channel to minimum phase channel; an equalizer input signal storing means for storing received symbols passed through the channel matched filtering means and the noncausal filtering means; a channel equalizing means for performing a decision feedback equalization (channel equalization) through filtering of a signal passed through the channel matched filtering means and the noncausal filtering means; a Trellis decoding means for detecting symbol from a signal channel-equalized by the channel equalizing means; a mode selecting means for selecting a specific mode; an error signal calculating means for comparing an output signal of the mode selected by the mode selecting means with an output signal of the channel equalizing means to calculate an error signal; and a tap coefficient updating means for updating tap coefficients being applied to the channel equalizing means by using the error signal from the error signal calculating means, an output signal from the equalizer input signal storing means, and an output signal from the Trellis decoding means.