Feed forward filter equalizer adaptation using a constrained filter tap coefficient value

A feed forward equalizer comprising:

• a plurality of filter taps comprising a set of filter taps to be adapted and a designated filter tap to be constrained;
• an adaptation component to:
• determine a set of adapted filter tap coefficient values corresponding to the set of filter taps to be adapted;
• and
• a constraint function component to determine a constrained filter tap coefficient value for the designated filter tap using a constraint function based on at least a portion of the set of adapted filter tap coefficient values, wherein execution of the constraint function comprises:
• adding a first adapted filter tap coefficient value of the set of adapted filter tap coefficient values corresponding to a first filter tap and a second adapted filter tap coefficient value of the set of adapted filter tap coefficient values corresponding to a second filter tap;
• and
• subtracting a third adapted filter tap coefficient value of the set of adapted filter tap coefficient values corresponding to a third filter tap;
• wherein an equalized signal is generated based at least in part on the set of adapted filter tap coefficient values and the constrained filter tap coefficient value.

A method comprising:

• determining, based on a signal, a set of adapted filter tap coefficient values corresponding to a set of filter taps to be adapted of a plurality of filter taps of a multi-tap filter structure;
• determining a constrained filter tap coefficient value for a designated filter tap using a constraint function based on at least a portion of the set of adapted filter tap coefficient values, wherein the designated filter tap comprises a first post-cursor filter tap of the plurality of filter taps, wherein execution of the constraint function comprises:
• adding a first adapted filter tap coefficient value of the set of adapted filter tap coefficient values corresponding to a first filter tap and a second adapted filter tap coefficient value of the set of adapted filter tap coefficient values corresponding to a second filter tap;
• and
• subtracting a third adapted filter tap coefficient value of the set of adapted filter tap coefficient values corresponding to a third filter tap;
• and
• generating an equalized signal based at least in part on the set of adapted filter tap coefficient values and the constrained filter tap coefficient value.