Title :
A study of turbo decoding with embedded AR channel model for perpendicular recording
Author :
Nakamura, Yoshihiko ; Okamoto, Yuji ; Osawa, Hideya ; Saito, Hiroshi ; Muraoka, Hiroaki ; Nakamura, Yoshihiko
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
Abstract :
Turbo decoding with an embedded autoregressive (AR) channel model is studied in an actual perpendicular magnetic recording channel. Performance of the a posteriori probability (APP) decoder is improved by applying an AR channel model in order to estimate the decoder input sequence. The bit-error-rate (BER) performance is obtained by read/write experiments using a spin stand with a perpendicular medium and an single-pole-type/giant magnetoresistive (SPT/GMR) head. The results show that our turbo coding and iterative decoding system using an AR channel model improves the BER performance.
Keywords :
autoregressive processes; iterative decoding; magnetic recording noise; maximum likelihood decoding; perpendicular magnetic recording; turbo codes; a posteriori probability decoder; bit error rate; embedded autoregressive channel model; iterative decoding; perpendicular magnetic recording; signal-dependent noise prediction; single-pole-type/giant magnetoresistive head; spin stand; turbo decoding; Bit error rate; Giant magnetoresistance; Iterative decoding; Magnetic heads; Magnetic noise; Magnetic recording; Maximum likelihood decoding; Perpendicular magnetic recording; Predictive models; Turbo codes;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.816482
