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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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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
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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

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