Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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LDPC-LDPC Product Code Using Modified Log-likelihood Ratio for Holographic Storage System

홀로그래픽 저장장치를 위한 수정된 로그-유사도비를 이용한 LDPC-LDPC 곱부호

  • Jeong, Seongkwon (Department of ICMC convergence technology, Soongsil University) ;
  • Lee, Jaejin (School of Electronics Engineering, Soongsil University)
  • 정성권 (숭실대학교 정보통신소재융합학과) ;
  • 이재진 (숭실대학교 전자정보공학부)
  • Received : 2017.03.13
  • Accepted : 2017.05.15
  • Published : 2017.06.25
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Abstract

Since holographic data storage has the advantage of high recording density and data transfer rate, it is a candidate for the next generation storage systems. However, Holographic data storage system is affected by interpage interference and two dimensional intersymbol interference. Also, burst error occurs by physical impact. In this paper, we propose an LDPC product code using modified log-likelihood ratio and extrinsic information to correct burst error and improve performance of holographic data storage. The performance of proposed LDPC product code is 0.5dB better than that of the conventional LDPC code.

홀로그래픽 데이터 저장장치는 높은 데이터 전송률과 저장용량이 매우 크기 때문에 차세대 저장장치 후보 중 하나이다. 하지만 홀로그래픽 데이터 저장장치의 오류요인으로는 인접 페이지간 간섭 및 2차원 인접 심볼간 간섭이 있다. 또한 물리적 영향에 의해 발생되는 연집오류가 있다. 본 논문에서는 이러한 연집오류를 정정하고 성능을 향상시키기 위해 수정된 로그-우도비값과 부가적 정보를 반복적으로 사용하는 방식을 제안한다. 제안하는 LDPC 곱부호는 일반적인 LDPC 부호와 비교하여 BER이 $10^{-5}$일 때, 약 0.5dB 성능 향상을 보였다.

Keywords

References

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