TY - JOUR
T1 - A study on iterative decoding with LLR modulator by parity check information in SMR system
AU - Nishikawa, M.
AU - Nakamura, Y.
AU - Osawa, H.
AU - Okamoto, Y.
AU - Kanai, Y.
AU - Muraoka, H.
N1 - Funding Information:
ACKNOWLEDGMENT This work was supported by the Advanced Storage Research Consortium, Japan.
Publisher Copyright:
© 1965-2012 IEEE.
PY - 2018/11
Y1 - 2018/11
N2 - In recent years, shingled magnetic recording (SMR) has attracted attention as a new recording system of the hard disk drives. Although SMR can realize narrow track by overwriting data track like tile roofing, it has remarkable performance deterioration due to the influence of inter-track interference. Therefore, the performance improvement of the low-density parity-check (LDPC) coding and iterative decoding system using the sum-product decoding is required. In this paper, we propose the LDPC encoding and iterative decoding system with the log-likelihood ratio modulator and show the error floor is eliminated and improvement of signal-to-noise ratio to achieve the error free is obtained in the SMR under an areal recording density of 4 Tbits/in2 specification for the channel bit sequence coded by run-length limited and LDPC encoders by computer simulation. Therefore, the channel bit is composed bit about five magnetic grains.
AB - In recent years, shingled magnetic recording (SMR) has attracted attention as a new recording system of the hard disk drives. Although SMR can realize narrow track by overwriting data track like tile roofing, it has remarkable performance deterioration due to the influence of inter-track interference. Therefore, the performance improvement of the low-density parity-check (LDPC) coding and iterative decoding system using the sum-product decoding is required. In this paper, we propose the LDPC encoding and iterative decoding system with the log-likelihood ratio modulator and show the error floor is eliminated and improvement of signal-to-noise ratio to achieve the error free is obtained in the SMR under an areal recording density of 4 Tbits/in2 specification for the channel bit sequence coded by run-length limited and LDPC encoders by computer simulation. Therefore, the channel bit is composed bit about five magnetic grains.
KW - Log-likelihood ratio (LLR)
KW - parity check information
KW - shingled magnetic recording (SMR)
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U2 - 10.1109/TMAG.2018.2833167
DO - 10.1109/TMAG.2018.2833167
M3 - Article
AN - SCOPUS:85047790760
VL - 54
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 11
M1 - 8369398
ER -