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

The Institute of Electronics and Information Engineers (대한전자공학회)
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4-Level 4/6 Modulation Code with Trellis Encoding on Holographic Data Storage

홀로그래픽 데이터 저장장치에서 트렐리스 인코딩을 이용한 4-레벨 4/6 변조부호

  • 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

Multi-level holographic data storage requires modulation codes for avoiding two dimensional inter-symbol interference (2D-ISI). Modulation codes can remove the fatal ISI pattern of neighboring the largest and the smallest symbols. In this paper, we propose a 4-level 4/6 modulation code and its trellis encoding for error correction. The proposed 4/6 modulation code prevents that the symbol 0 and 3 are not adjacent in any direction. Also, we compare the proposed modulation code with the same code rate modulation codes for four-level holographic data storage.

멀티레벨 홀로그래픽 데이터 저장장치는 성능을 저하시키는 요소인 2차원 인접 심볼간 간섭을 피하기 위해 변조부호가 요구된다. 변조부호는 주변의 가장 큰 심볼과 가장 작은 심볼에 의해 발생되는 심각한 ISI 패턴을 제거할 수 있다. 본 논문에서는 4-레벨 홀로그래픽 데이터 저장장치를 위한 4/6 변조부호를 제안하며 또한 트렐리스 인코딩 방식을 이용하여 오류정정능력을 갖는 변조부호를 제안한다. 제안하는 4/6 변조부호는 가장 작은 심볼인 '0'과 가장 큰 심볼인 '3'이 어느 방향에서도 인접하지 않도록 한다. 또한 4-레벨 홀로그래픽 데이터 저장장치에서 같은 코드율을 갖는 변조부호들과 성능 비교를 한다.

Keywords

References

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