Influence of Jitter-like Noise on Performance of PRML Systems Using Double-layered Perpendicular Medium

Abstract

The influence of jitter-like noise on the performance of PRML systems in the perpendicular magnetic recording channel using a double layered medium is studied. Both the bit error rate(BER)performance and the required SNR to achieve a BER of 10^<-4> are obtained by computer simulation and are compared. The results show that PRML systems with the only positive coefficients exhibit the good performance even for the channel in which the power ratio of the jitter-like noise to the white noise at the reading point is fifty-fifty.