A Study on Iterative Decoding With LLR Modulator Using Neural Network in SMR System
Madoka Nishikawa, Y. Nakamura, Hisashi Osawa, Yoshihiro Okamoto, Yasushi Kanai · IEEE Transactions on Magnetics · 2019
This paper focuses on the shingled magnetic recording (SMR) as the recording system for further high-density hard disk drives. Previously, we applied a log-likelihood ratio (LLR) modulator to the low-density parity check coding and iterative decoding system in SMR to improve the decoding performance. In this paper, we propose a new LLR modulator using neural network. Furthermore, we clarify that the proposed LLR modulator using neural network realizes effective iterative decoding in a read/write channel with pattern-dependent medium noise.