A study of turbo decoding with embedded AR channel model for perpendicular recording
Y. Nakamura, Yoshihiro Okamoto, Hisashi Osawa, Hidetoshi Saito, Hiroaki MURAOKA, Y. Nakamura · IEEE Transactions on Magnetics · 2003
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.