A Partial Response Maximum Likelihood Detection Using Modified Viterbi Decoder for Asymmetric Optical Storage Channels

  • Lee, Kyu-Suk (Telecommunication and Information Storage Lab., Department of Electronic Engineering, Dongguk University) ;
  • Lee, Joo-Hyun (Telecommunication and Information Storage Lab., Department of Electronic Engineering, Dongguk University) ;
  • Lee, Jae-Jin (Telecommunication and Information Storage Lab., Department ofElectronic Engineering, Dongguk University)
  • Published : 2005.07.01

Abstract

We propose an improved partial response maximum likelihood (PRML) detector with the branch value compensation of Viterbi decoder for asymmetric high-density optical channel. Since the compensation value calculated by a survival path is applied to each branch metric, it reduces the detection errors by the asymmetric channel. The proposed PRML detection scheme improves the detection performance on the $2^{nd},\;3^{rd}\;and\;4^{th}$ order PR targets for asymmetric optical recording channel.

Keywords

References

  1. K. A. Schouhamer Immink, 'Runlength -limited sequences,' Proc. IEEE, vol. 78, no. 11, pp. 1745-1759, Nov. 1990 https://doi.org/10.1109/5.63306
  2. John G. Proakis and Masoud Salehi, Communication Systems Engineering, Prentice Hall, 1994, pp.480-484
  3. N. Ide, 'Adaptive partial response maximum likelihood detection in optical recording media,' Jpn. J. Appl. Phys., 41, pp. 1789-1790, 2002 https://doi.org/10.1143/JJAP.41.1789
  4. T. Narahara, S. Kobayashi, M. Hattori, Y. Shimpuku, G. van den Enden, J. Kahlman, M. van Dijk and R. van W oudenberg, 'Optical disc system for digital video recording,' Jpn. J. Appl. Phys., 39, pp. 912-919, 2000 https://doi.org/10.1143/JJAP.39.912
  5. J. W. M. Bergmans, Digital Baseband Transmission and Recording, Netherlands: Kluwer Academic Publishers, 1996, pp. 76-85