Method and apparatus for fault recovery in a decision feedback equalizer

A method of equalizing a sequence of received symbols including predetermined symbols comprising the steps of:

• adaptively filtering the symbols in the frequency domain using at least one single-tap filter, wherein the adaptive filtering is based in part on decision feedback information, and wherein the update filter increment value is μ1;
• determining whether a predetermined symbol has been received, and if so:
• generating at least one reference symbol;
• calculating an error in response to the filtered predetermined symbol and the at least one reference symbol;
• updating the at least one single-tap filter in response to the error using an aggressive update algorithm.

A system comprising:

• a processing unit;
• and
• machine language instructions stored in data storage executable by the processing unit to perform functions including:
• adaptively filtering received symbols in the frequency domain using at least one single-tap filter, wherein the adaptive filtering is based in part on decision feedback information, and wherein the update filter increment value is μ1;
• determining whether a predetermined symbol has been received, and if so:
• generating at least one reference symbol;
• calculating an error in response to the filtered predetermined symbol and the at least one reference symbol;
• and
• updating the at least one single-tap filter in response to the error using an aggressive update algorithm.