DOI QR코드

DOI QR Code

Two Dimensional Intersymbol Interference Compensation for Bit Patterned Media

비트 패턴드 미디어를 위한 2차원 인접 심볼 간 간섭 보상

  • Jeong, Seongkwon (School of Electronics Engineering, Soongsil University) ;
  • Lee, Jaejin (School of Electronics Engineering, Soongsil University)
  • 정성권 (숭실대학교 전자정보공학부) ;
  • 이재진 (숭실대학교 전자정보공학부)
  • Received : 2015.04.21
  • Accepted : 2015.05.22
  • Published : 2015.06.25

Abstract

Bit patterned media (BPM) is a high capacity storage system and has attracted a great deal of attention as next generation data storage. When BPM is made with high density, the space between the islands narrows, because BPM records one bit in an island. For this reason, BPM has inter-symbol interference in all directions, unlike in current storage systems where it is in only one direction. In this paper, we propose an equation for compensating two-dimensional ISI. We conduct experiments on track misregistration. When using the proposed inter-symbol interference preprocessing, the BER performance is improved, regardless of the amount of track misregistration.

비트 패턴드 미디어는 고용량 저장장치이며 유력한 차세대 자기 기록 저장장치로 관심 받고 있다. 비트 패턴드 미디어는 작은 크기의 섬에 하나의 비트를 기록하기 때문에 고밀도로 구현할 경우 저장 비티의 간격이 좁아진다. 이러한 이유로 한 방향으로만 간섭을 받는 기존의 저장장치와는 달리 비트 패턴드 미디어는 모든 방향에서 인접 심볼 간 간섭을 받는다. 본 논문에서는 인접 심볼 간 간섭을 보상하기 위해 수식을 제안한다. 트랙 위치 오프셋에 따라 실험을 하였으며 제안된 인접 심볼 간 간섭 전처리 과정을 사용하였을 때, 트랙 위치 오프셋에 관계없이 BER 성능을 향상 시킬 수 있다.

Keywords

References

  1. R. L. White, R. M. H. New, and R. F. W. Pease, "Patterned media: A viable route to 50 Gbit/in2 and up for magnetic recording," IEEE Trans. Magn., Vol. 33, no. 1, pp. 990-995, January 1997. https://doi.org/10.1109/20.560144
  2. P. L. Lu and S. H. Charap, "Thermal instability at 10Gbit/in magnetic recording," IEEE Trans. Magn., Vol. 30, no. 6, pp. 4230-4232, November 1994. https://doi.org/10.1109/20.334044
  3. J. Zhu, Z. Lin, L. Guan, and W. Messner, "Recording, noise, and servo characteristics of patterned thin film media," IEEE Trans. Magn., Vol. 36, no. 1, pp. 23-29, January 2000. https://doi.org/10.1109/20.824420
  4. P. W. Nutter, I. T. Ntokas, B. K. Middleton, and D. T. Wilton, "Tracking issues in high-density patterned media storage," Intermag 2005, Digest of Technical Papers, pp. 1377-1378, April 2005.
  5. P. W. Nutter, I. T. Ntokas, B. K. Middleton, and D. T. Wilton, "An investigation of the effects of media characteristics on read channel performance for patterned media," IEEE Trans. Magn., Vol. 41, no. 11, pp. 4327-4334, November 2005. https://doi.org/10.1109/TMAG.2005.856586
  6. P. W. Nutter, I. T. Ntokas, B. K. Middleton, and D. T. Wilton, "Effect of island distribution on error rate performance in patterned media," IEEE Trans. Magn., Vol. 41, no. 10, pp. 3214-3216, October 2005. https://doi.org/10.1109/TMAG.2005.854780
  7. P. W. Nutter, D. M. Mckirdy, B. K. Middleton, and D. T. Wilton, "Effect of island geometry on the replay signal in patterned media storage," IEEE Trans. Magn., Vol. 40, no. 6, pp. 3551-3558, November 2004. https://doi.org/10.1109/TMAG.2004.835697
  8. S. Nabavi, B. V. K. Kumar, and J. A. Bain, "Two-dimensional pulse response and media noise modeling for bit-patterned media," IEEE Trans. Magn., Vol. 44, no. 11, pp. 3789-3792, November 2008. https://doi.org/10.1109/TMAG.2008.2002387
  9. J. Kim and J. Lee "Iterative two-dimensional soft output Viterbi algorithm for patterned media," IEEE Trans. Magn., Vol. 47, no. 3, pp. 594-597, March 2011. https://doi.org/10.1109/TMAG.2010.2100371
  10. H. Kim, P. Yoon, J. Park, H. Jung, and G. Park, "Misalignment compensation and equalization for holographic data storage," Jpn. J. Appl. Phys., Vol. 48, no. 3, pp. 03A034, March 2009.