한국통신학회논문지 (The Journal of Korean Institute of Communications and Information Sciences)

한국통신학회 (The Korean Institute of Commucations and Information Sciences)
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홀로그래픽 데이터 저장장치를 위한 4-레벨 오류정정 변조부호

4-level Error Correcting Modulation Codes for Holographic Data Storage System

  • Lee, Jaehun (Soongsil University, School of Electronic Engineering) ;
  • Lee, Jaejin (Soongsil University, School of Electronic Engineering)
  • 투고 : 2014.09.15
  • 심사 : 2014.09.23
  • 발행 : 2014.10.31
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초록

멀티레벨 홀로그래픽 데이터 스토리지 시스템은 픽셀당 1비트 이상을 저장할 수 있기 때문에 용량에서 큰 이점을 갖는다. 만약 부호율이 2/3인 변조부호라면 2/3(symbol/pixel)은 4/3(bit/pixel)이고, 이것은 1pixel에 약 1.3개 bit를 담을 수 있다. 본 논문에서는 멀티레벨 홀로그래픽 데이터 저장장치에서 한 픽셀이 4-레벨을 가지는 경우, 최소 유클리디안 거리가 3과 4인 변조부호를 각각 제안하였다. 제안한 변조부호는 랜덤한 경우보다 훨씬 더 좋은 성능을 보였고, 거리가 클수록, 성능이 더 좋아지는 것을 보였다.

Mutilevel holographic data storage systems have a big advantage for capacity since it can store more than one bit per pixel. For instance, 2/3 modulation code stores 2/3(symbol/pixel) and 4/3(bit/pixel). Then it is about 1.3 bits per one pixel. In this paper, we propose two 4-level modulation codes, which have the minimum Euclidean distances of 3 and 4, respectively. The proposed codes perform better than random data. The performance of larger minimum distance code shows better than that of shorter one.

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참고문헌

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