単層膜媒体による垂直磁気記録のためのPRML方式  [in Japanese] PRML Systems for Perpendicular Magnetic Recording Using a Single-Layer Medium  [in Japanese]

PRML systems for perpendicular magnetic recording using a single-layer medium were studied. Reproduced waveforms at linear densities of 150 to 300 kBPI were acquired by recording and reading-back experiments using a perpendicular single-layer medium, and dibit responses ware derived from these waveforms. Using these responses were derived from these waveforms. Using these responses in computer simulation, the performance of PRML systems for (1,7) RLL code was estimated from the SNR required at the reading point to achieve a bit-error rate of 10^<-4>. The results show that a PR (1,2,1,0,-1,-2,-1) ML system has a mech better performance than a PR5ML system at linear densities of 250 to 300 kBPI.