Title :
BER Performance of PRML System in Perpendicular Magnetic Recording Channel With Thermal Decay
Author :
Shinohara, Nobuhiro ; Osawa, Hideya ; Okamoto, Yuji ; Nakamura, Yoshihiko ; Nakamoto, A. ; Miura, Kiyotaka ; Muraoka, Hiroaki ; Nakamura, Yoshihiko
Author_Institution :
Graduate Sch. of Sci. & Eng., Ehime Univ., Matsuyama
fDate :
6/1/2007 12:00:00 AM
Abstract :
The long-term bit error rate (BER) performance of partial response maximum likelihood (PRML) system in a perpendicular magnetic recording (PMR) channel with thermal decay is studied. A thermal decay model based on the experimental data for three CoPtCr-SiO2 PMR media with different thermal stability is obtained. Then, the performance of PR1ML channel for the 16/17(0,6/6) and 128/130(0,16/8) codes as a run-length-limited (RLL) code is evaluated by computer simulation using the model. Moreover, the relationships between the elapsed time and the BER are obtained for the combinations of two RLL codes and three PMR media and their performances are compared. The results show that for the combination of the 128/130(0,16/8) code and the medium with the poorest thermal stability, the degradation with the elapsed time is noticeable compared with the other combinations
Keywords :
error statistics; magnetic materials; maximum likelihood estimation; perpendicular magnetic recording; runlength codes; thermal stability; BER; PMR media; PRML system; bit error rate; partial response maximum likelihood system; perpendicular magnetic recording channel; run-length-limited code; thermal decay; thermal stability; Bit error rate; Computer simulation; Equations; Gaussian noise; Magnetic noise; Magnetic recording; Perpendicular magnetic recording; Thermal degradation; Thermal engineering; Thermal stability; Long-term bit error rate (BER) performance; partial response maximum likelihood (PRML) system; perpendicular magnetic recording (PMR); run-length-limited (RLL) code; thermal decay;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.893422
