Apparatus and method of decision feedback equalization using channel properties change

1. the art that the invention defined in the claims The present invention relates to a decision feedback equalizer will apparatus and method using the channel characteristics change. 2. The invention attempts to solve the technical challenges The present invention using a channel matched filter by using the (channel-matched filter) changing gently (mild) a channel characteristic of a distorted received signal by the bad channel, non-causal filter (Noncausal filter) by the channel matched filter the characteristics of a changed channel symbols of a non-minimum phase sikimyeo approximated to the minimum phase (minimum phase) in (Nonminimum phase), TBD (Trace Back Depth) is 1 and the complexity is reduced trellis (trellis) a decoder decision feedback equalizer device to provide for reducing the error is determined by using a detector, decision feedback equalization apparatus and method that purpose. 3. Resolution of the subject matter of the invention, The present invention, channel estimation means for estimating the channel of the received signal through the received signal and the training sequence; Channel matched filtering means to maximize the signal-to-noise ratio (SNR) from a channel estimated by the channel estimating means for changing the channel characteristics of the received signal; Non-causal filter means for approximating a channel that changes in the channel matched filter means at a minimum-phase channel in the non-minimum phase channel; An equalizer input signal storing means for storing the received symbols passed through the channel matched filter means and the non-causal filtering means; The channel matched filter means and the channel equalization means for performing the decision feedback equalization (channel equalization) by filtering of the signals passing through the non-causal filtering means; Trellis decoding means for detecting the symbols from the channel equalized signal from said channel equalization means; Mode selecting means for selecting a particular mode; It means for calculating an error signal by comparing the output signal of the mode selected by the mode selecting means and an output signal of the channel equalization means to calculate an error signal; And updating the tap coefficients for updating the error signal and the output signal of the trellis decoding means for the channel equalization means is applied to a tap coefficient by using the output signal of the equalizer input signal storage means from the error signal calculation means, including the means. 4. An important use of the invention, The invention yiyongdoem such ground wave digital broadcast receiver. Decision feedback equalizer, channel equalization, channel matched filter, non-causal filter and trellis decoder