Low complexity symbol detection method for multilevel 2-D optical storage based on a linear channel model

Abdolhosein Moinian, Lina Stankovic, Bahram Honary

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A symbol detection scheme based on the Viterbi algorithm that simultaneously processes subsets of 2-D data in the presence of Gaussian noise was recently proposed for binary 2-D optical storage (TwoDOS). In the case of multilevel TwoDOS, a straightforward full-fledged maximum likelihood symbol detector, or even the previous Viterbi-based algorithm, is not an ideal solution due to complexity restrictions. We propose a suboptimum low complexity symbol detector, which still performs within the accepted performance bound for optical storage. We describe the procedures involved in designing and developing a practical symbol detection scheme for multilevel TwoDOS by analyzing the signal values generated by a linear channel model in the presence of Gaussian noise. Our proposed detection scheme exploits the properties of the 2-D data format on the disk, and is flexible enough to accommodate performance and complexity restrictions for optical storage applications.
Original languageEnglish
Article number105201
Number of pages8
JournalOptical Engineering
Issue number10
Publication statusPublished - 1 Oct 2005


  • detection
  • detector
  • optical storage
  • Viterbi algorithm

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