Patent ID: 7421020

Claim:
A channel equalizing device of a digital broadcasting receiving system in which a digital broadcasting signal received over a channel is compensated for channel distortion in order to recover an original signal, the device comprising: a channel estimating unit for estimating and outputting a channel impulse response of a signal which is received over a transmission channel; a channel characteristic detecting unit for determining whether a channel characteristic is a dynamic channel or a static channel by using a difference between a current channel impulse response and a previous channel impulse response; and a channel equalizing unit for controlling a parameter of an internal filter according to the channel characteristic determined by the channel characteristic detecting unit to compensate for the channel distortion in the received signal, wherein the channel equalizing unit performs a channel equalization to update a coefficient of the internal filter by one of: utilizing a blind adaptive method that obtains an error in G-Pseudo way if it is determined that the channel characteristic is the dynamic channel and obtains the error in Stop-and-Go way if it is determined that the channel characteristic is the static channel; and utilizing a method that increases a step-size if it is determined that the channel characteristic is the dynamic channel and decreases and provides the step-size that is less than in the dynamic channel if it is determined that the channel characteristic is the static channel.