Iterative LDPC-SPC Product Code with LLR Controller for Bit-Patterned Media Recording 


Vol. 45,  No. 2, pp. 239-244, Feb.  2020
10.7840/kics.2020.45.2.239


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  Abstract

A bit-patterned media recording (BPMR) that can achieve an areal density of 1 terabit per square inch or higher is a type of future magnetic storage system. However, because the space between islands in both the down- and cross-track directions is reduced to extend the areal density, the effect of two-dimensional interference, which consists of both intersymbol and intertrack interference, is increased. This paper proposes an iterative low-density parity check (LDPC) - single parity check (SPC) product code with a log-likelihood ratio (LLR) controller for BPMR for bit-patterned media recording to improve the performance. The inner code improves the error correction ability by applying a LDPC code and the outer code increases the coding rate and flexibility by using a SPC code. The system performance is further improved by using an iterative algorithm between the inner and outer codes with LLR controller. The LLR controller, which uses the relationship between the syndrome and parity check matrix, receives the output of the LDPC decoder as input and modifies the LLR value to improve the performance. Simulation results indicate that the proposed product coding scheme with an LLR controller outperforms the existing product coding scheme without such a controller.

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  Cite this article

[IEEE Style]

S. Jeong and J. Lee, "Iterative LDPC-SPC Product Code with LLR Controller for Bit-Patterned Media Recording," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 2, pp. 239-244, 2020. DOI: 10.7840/kics.2020.45.2.239.

[ACM Style]

Seongkwon Jeong and Jaejin Lee. 2020. Iterative LDPC-SPC Product Code with LLR Controller for Bit-Patterned Media Recording. The Journal of Korean Institute of Communications and Information Sciences, 45, 2, (2020), 239-244. DOI: 10.7840/kics.2020.45.2.239.

[KICS Style]

Seongkwon Jeong and Jaejin Lee, "Iterative LDPC-SPC Product Code with LLR Controller for Bit-Patterned Media Recording," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 2, pp. 239-244, 2. 2020. (https://doi.org/10.7840/kics.2020.45.2.239)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880