Apparatus and method for channel equalizing in vsb receiver

The present invention using a training sequence included in the field sync signal each time from the received signal, in particular, through the transmission channel relates to a channel equalization apparatus and method of the terrestrial digital broadcasting reception system of the VSB system is a field sync signal input by estimating the impulse response of the channel, and taking the absolute value or the square to a difference between the estimated channel impulse response of the current field and the channel impulse response in the previous field, measuring the degree of change of the channel, a preset degree of change in the channel threshold and then compared to the value determine whether the channel characteristics are dynamic channel is static channel by controlling the filter parameters in the group of suitable channel equalizer to the characteristics of the determined channel, it is possible to improve the performance of channel equalization. Static channel, a dynamic channel, the channel estimation