A center tap of a transversal filter, which forms part of a forward equalizer, is shifted by at least one symbol interval. An error signal is generated using a decision output and tap outputs of the forward and backward equalizers. An impulse response estimation circuit is provided to receive the decision...http://www.google.de/patents/US5119401?utm_source=gb-gplus-sharePatent US5119401 - Decision feedback equalizer including forward part whose signal reference point is shiftable depending on channel response
