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Turbo Equalization Effect for Nonbinary LDPC Code in BPM R/W Channel

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6 Author(s)
Nakamura, Y. ; Grad. Sch. of Sci. & Eng., Ehime Univ., Matsuyama, Japan ; Bandai, Y. ; Okamoto, Y. ; Osawa, H.
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It is expected for the nonbinary low-density parity-check (LDPC) coding and iterative decoding system to introduce the turbo equalization in order to enhance the error correction ability in the bit-patterned medium (BPM) R/W channel. In this paper, we investigate the effect of the turbo equalization on the bit-error rate (BER) performance of nonbinary LDPC coding and iterative decoding system over Galois filed GF(28) in BPM R/W channel with write-error at an areal recording density of 2 Tbit/inch2 considering the coding rate loss. The performance of turbo equalization using the nonbinary LDPC coding and iterative decoding system is evaluated by computer simulation, and it is compared to that without turbo equalization. The results show that the nonbinary LDPC and iterative decoding system with the turbo equalization has the larger write-margin compared to that without turbo equalization.

Published in:

Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )

Date of Publication:

Nov. 2012

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