A multi-cycle operational signal processing core for an adaptive equalizer for magnetic system application

An adaptive equalizer has been developed using multi-cycle operational signal processing cores; an equalizing filtering core and a coefficient calculating core including an IIR stabilizing filter. The authors propose an IIR stabilizing filter core and discuss the stability of the adaptive equalizer. The proposed IIR filter core needs less than half number of gates of an FIR filter core realized in a straight ford way of design, and it keeps excellent stability. Each core, an equalizing filtering core and a coefficient calculating core, operates seven cycle time of 20ns during a sampling period. The number of gates was a third of straight ford design where one operator is employed during a sampling period. The proposed architecture made it possible to realize a fully digital equalizer with maximum likelihood detection and clock recovery