A time domain equalizer for a discrete multi-tone modem that includes an estimation of the contribution of out of band noise and echo to the overall channel impulse response. At start up the modem estimates out of band noise and echo. Using a minimum mean square error analysis, the time domain equalizer...http://www.google.de/patents/US6404806?utm_source=gb-gplus-sharePatent US6404806 - Method and apparatus for time-domain equalization in FDM-based discrete multi-tone modems
