VITERBI DETECTOR INCLUDING PRML AND EPRML

We developed an integrated-Viterbi-detector which can handle PRML and EPRML. Both PR4 and EPR4 equalization can be accepted according to the recording density. The EPRML performance is superior to that of PRML for normalized recording density above 1.8, but inferior at lower dens ities. Our experimental results agree with theoretical values and prov e that the performance of this Viterbi detector is superior, by 8 dB, to that of conventional peak detectors when the normalized recording d ensity is 2.7.