Apparatus of channel equalizer and method of same

It relates to a channel equalizer for equalizing using a gradient (Conjugate-Gradient) algorithm - The invention relates to a conjugate in to the channel equalization of a digital TV, in particular the frequency domain. According to the invention, from a received signal that has passed through the channel, a training signal period, a pre-stored training sequence for the data interval in the received feedback the channel equalized signal conjugate - a channel estimator for estimating impulse response of the channel using a gradient algorithm and, a coefficient calculator to obtain the coefficients of the by using the estimated channel impulse response equalization in the frequency domain, groups, multiplied by and the received transform the signal into a frequency domain signal coefficient of the calculated equalizer for outputting equalized signal channel in time in being configured by comprising a removing noise removed by prediction over the gradient algorithm, as well as a static channel where the change of the channel fast dynamic channel multiplier and the amplified noise conjugate in the time domain of the equalized signal improved lighting performance is to track changes in the impulse response being There is an effect. A channel equalizer, a channel estimate, a noise prediction, a conjugate-gradient algorithm