Title :
Jitter-like noise cancellation using AR model of PR channel in perpendicular magnetic recording
Author :
Okamoto, Y. ; Masunari, N. ; Yamamoto, H. ; Osawa, H. ; Saito, H. ; Muraoka, H. ; Nakamura, Y.
Author_Institution :
Fac. of Eng., Ehime Univ., Matsuyama, Japan
fDate :
9/1/2002 12:00:00 AM
Abstract :
Performance improvement of partial-response maximum-likelihood (PRML) system in the perpendicular magnetic recording channel with jitter-like noise is studied. The performance of a Viterbi detector is improved by applying an autoregressive (AR) model in order to estimate the detector input sequence. The required signal-to-noise ratio to achieve a bit-error rate (BER) of 10-4 is obtained by computer simulation. In addition, a BER performance is also obtained by read/write experiments using a spin-stand. The results show that the proposed PRML system using an AR model exhibits better performance when compared with the normal PRML systems without an AR model.
Keywords :
Viterbi detection; autoregressive processes; error statistics; interference suppression; jitter; maximum likelihood detection; partial response channels; perpendicular magnetic recording; AR model; BER performance; PR channel; PRML system; Viterbi detector; autoregressive model; bit-error rate; detector input sequence estimation; jitter-like noise cancellation; partial response channel; partial-response maximum-likelihood system; perpendicular magnetic recording; read/write experiments; signal-to-noise ratio; spin-stand testing; Bit error rate; Computer simulation; Detectors; Magnetic noise; Maximum likelihood detection; Maximum likelihood estimation; Noise cancellation; Perpendicular magnetic recording; Signal to noise ratio; Viterbi algorithm;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801902
