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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

Performance of Read Head Offset on Patterned Media Recording Channel

패턴드 미디어 채널에서 트랙 위치 오프셋에 따른 성능

  • 김진영 (숭실대학교 정보통신전자공학부 정보저장 및 통신 연구실) ;
  • 이재진 (숭실대학교 정보통신전자공학부)
  • Received : 2010.10.13
  • Accepted : 2010.10.21
  • Published : 2010.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

We investigate the bit error rate against signal-to-noise ratio performance corresponding to track mis-registration for patterned media storage. The patterned media channels with and without soft underlayer are implemented, and we simulate using one-dimensional Viterbi detector and two-dimensional soft output Viterbi detector (SOVA) when the track mis-registration is 0% (on-track), 10%, 20%, 30%, and 40%. While the BER performance degrades approximate 0.3 ~ 0.5 dB at 10% track mis-registration, it degrades severe over 10% track mis-registration.

본 논문은 차세대 저장장치로 각광받고 있는 패턴드 미디어 장치에 대한 트랙 위치 오프셋에 따른 성능을 알아본다. 패턴드 미디어 채널은 SUL(Soft Underlayer)의 유무에 따라 1차원 검출기인 비터비 검출기와 2차원 검출기인 2차원 SOVA(Soft output Viterbi algorithm)를 이용해 실험하였고, 트랙 위치 오프셋이 없을 때, 10%, 20%, 30%, 40% 있을 때 실험하였다. 트랙 위치 오프셋이 10%일 때는 성능영화가 0.3 dB ~ 0.5 dB 정도로 크지 않았지만 그 이상이 되면, 성능열화가 심해지는 것을 볼 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, 1997. https://doi.org/10.1109/20.560144
  2. P. L. Lu and S. H. Charap, "Thermal Instability at 10Gbit/in2 Magnetic Recording," IEEE Trans. Magn., Vol.30, No.6, pp.4230-4232, 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, 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, 2005.
  5. P. W. Nutter, I. T. Ntokas, and B. K. Middleton, "An investigation of the effects of media characteristics on read channel performance for patterned media storage," IEEE Trans. Magn., Vol.41, No.11, pp.4327-4334, 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, 2005. https://doi.org/10.1109/TMAG.2005.854780
  7. J. Kim and J. Lee, "Partial response maximum likelihood detections using two-dimensional soft output Viterbi algorithm with two-dimensional equalizer for holographic data storage," Jpn. J. Apl. Phys., Vol.48, No.3, pp.03A033, 2009. https://doi.org/10.1143/JJAP.48.03A033
  8. J. Kim and J. Lee, "Two-dimensional SOVA and LDPC codes for holographic data storage system," IEEE Trans. Magn., Vol.45, No.5, 2009.
  9. J. Hagenauer and P. Hoeher, "A Viterbi Algorithm with Soft-decision Output and its Applications," Proc. IEEE Globecom, Vol.3, pp.1680-1686, 1989.