Patent ID: 6167082
Filing Date: 2000-12-26
Classification: H04L

Abstract:
An adaptive equalizer in a communication system having a precoder using transmitter coefficients for pre-equalizing the channel for post-cursor intersymbol interference, comprising:a feed forward equalizer receiving a signal from a communication channel, the feed forward equalizer equalizing variations in pre-cursor intersymbol interference resulting from changes in characteristics of the channel and providing an output signal to an error correction decoder;a decision circuit, coupled to the feed forward equalizer, for generating error vectors in response to the output signal of the feed forward equalizer; anda decision feedback equalizer, coupled to the decision circuit, the decision feedback equalizer monitoring the pre-cursor intersymbol interference of the channel, determining when the transmitter coefficients to the precoder warrant updating, and generating a signal indicating that an update to the transmitter coefficients to the precoder is warranted.