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

The Institute of Electronics and Information Engineers (대한전자공학회)
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12/16 Modulation Code for 4-Level Holographic Data Storage

4-레벨 홀로그래픽 데이터 저장장치를 위한 12/16 변조부호

  • Jeong, Seongkwon (School of Electronics Engineering, Soongsil University) ;
  • Lee, Jaejin (School of Electronics Engineering, Soongsil University)
  • 정성권 (숭실대학교 전자정보공학부) ;
  • 이재진 (숭실대학교 전자정보공학부)
  • Received : 2016.08.12
  • Accepted : 2016.09.20
  • Published : 2016.10.25
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Abstract

Holographic data storage (HDS) features short access times, high storage capacities, and fast transfer rates since the data is recorded and read not by lines but by pages within a volume of holographic material. Furthermore, a single pixel can store more than 1 bit if it is multi-level. However, there is a problem of inter-symbol interference (ISI) between the adjacent symbols if the level difference between neighboring symbols is large. Hence, one should avoid side by side placement of the smallest level symbol and the largest level symbol in any direction. This paper proposes a 12/16 modulation code for 4-level holographic data storage, so that the largest symbol is 3 and the smallest symbol is 0, in order to reduce the ISI.

홀로그래픽 데이터 저장장치에서 데이터는 줄 단위가 아닌 페이지 단위처리하기 때문에, 짧은 접근 시간, 고용량, 빠른 전송 능력을 갖는다. 또한 멀티레벨 홀로그래픽 데이터 저장장치에서는 하나의 픽셀은 1bit이상 저장이 가능하다. 하지만 인접한 심볼간의 레벨의 차이가 클수록 인접 심볼간 간섭 문제가 발생한다. 그러므로 가장 큰 심볼과 가장 작은 심볼이 인접하는 것을 방지해야 한다. 본 논문에서는 인접 심볼간 간섭을 줄이기 위해 4-레벨 홀로그래픽 데이터 저장장치를 위한 12/16 변조부호를 제안한다.

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References

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