A channel equalizer includes a first transformer, an estimator, an average calculator, a second transformer, a coefficient calculator, a compensator, and a third transformer. The first transformer converts normal data into frequency domain data, where a known data sequence is periodically repeated in...http://www.google.co.uk/patents/US8054891?utm_source=gb-gplus-sharePatent US8054891 - Channel equalizer and method of processing broadcast signal in DTV receiving system
