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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Performance of 4-level Modulation Code for Holographic Data Storage

홀로그래픽 데이터 저장장치를 위한 4-레벨 변조 부호의 성능 비교

  • Park, Keunhwan (School of Electronic Engineering, Soongsil University) ;
  • Lee, Jaejin (School of Electronic Engineering, Soongsil University)
  • Received : 2015.08.28
  • Accepted : 2015.09.11
  • Published : 2015.09.30
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Abstract

The multi-level holographic storage system can store more than one bit per pixel. In this paper, we introduce a 6-pixel 4-level modulation code and compare with 4-level 6/9 modulation code and 2/3 modulation code. The proposed 6-pixel modulation code has the minimum Euclidean distance 3. The 6-pixel modulation code is approximately 1dB better than the other modulation codes.

멀티레벨 홀로그래픽 데이터 저장장치는 한 픽셀에 1비트 보다 많은 데이터를 저장할 수 있다. 본 논문에서는 부호율이 8/6=1.33 (bit/pixel)이고 한 픽셀이 4-레벨을 갖는 6픽셀 변조부호를 제안하고 기존에 제안된 4-레벨 6/9 변조부호, 2/3 변조부호의 성능을 비교한다. 제안된 6픽셀 변조부호는 하나의 코드워드가 6픽셀로 구성되어 있고 최소 유클리디안 거리가 3 이상인 변조부호이다. 6픽셀 변조부호는 기존에 제안된 변조부호들 보다 약 1dB 정도의 성능 이득이 있었다.

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References

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