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

대한전자공학회 (The Institute of Electronics and Information Engineers)
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홀로그래픽 데이터 저장장치를 위한 저밀도 ON 픽셀 2차원 4-레벨 4/6 균형 변조부호

A Sparse-ON Pixel Two-Dimensional 4-Level 4/6 Balanced-Modulation Code in Holographic Data Storage Systems

  • 박근환 (숭실대학교 전자정보공학부) ;
  • 이재진 (숭실대학교 전자정보공학부)
  • Park, Keunhwan (School of Electronics Engineering, Soongsil University) ;
  • Lee, Jaejin (School of Electronics Engineering, Soongsil University)
  • 투고 : 2016.08.27
  • 심사 : 2016.10.07
  • 발행 : 2016.11.25
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초록

홀로그래픽 데이터 저장장치 (HDSS)는 한 픽셀에 1비트 이상의 데이터를 저장 가능하며 전송 속도 및 저장 용량을 증가시키는 장점이 있다. 하지만 2차원적으로 생기는 인접 심볼 간의 간섭 (ISI) 및 페이지 간의 간섭 (IPI)이 발생한다. 본 논문에서는 홀로그래픽 데이터 저장장치에서 부호율이 1.33 bit/pixel이면서 코드워드의 밀도가 균일한 부호를 제안하였다. 제안된 저밀도 ON 픽셀 4/6 2차원 균형 변조부호는 기존의 2/3, 6/9 변조부호와 비교하여 비슷한 성능을 보이지만, 한 페이지에 기록되는 ON 픽셀의 비율을 낮춤으로써 체적 내에 페이지 수를 늘려 저장 용량을 증가시킬 뿐만 아니라 코드워드의 밀도가 균일하여 인접 페이지 간의 간섭을 줄일 수 있다.

In the holographic data storage system, the data can be stored more than one bit per pixel and the storage capacity and transmission rate can be increased. In this paper, we proposed a sparse-ON pixel 4/6 balanced-modulation code that the code rate is 1.33 (bit/pixel) with uniform page density. Even though the performance of the proposed sparse-ON pixel 4/6 balanced-code is similar to 2/3 and 6/9 modulation codes, it can increase the storage capacity more than these modulation codes and also store more pages in a volume by reducing the rate of ON pixels to mitigate IPI (inter-page interference).

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참고문헌

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