Partial Response Maximum Likelihood for Optical Data Storage Using Simple Optical Equalizers

The effects of introducing shading bands into the collector path of optical storage devices to equalize optically the signal to a partial response target have been investigated. A software simulation of the optical readout process and the partial-response maximum-likelihood (PRML) read channel have...

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Bibliographic Details
Published in:JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE REV PAP 2000, Vol.39 (2S), p.808-814
Main Authors: Jepson, Stephen D., Nutter, Paul W., Wright, C. David
Format: Article
Language:English
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Summary:The effects of introducing shading bands into the collector path of optical storage devices to equalize optically the signal to a partial response target have been investigated. A software simulation of the optical readout process and the partial-response maximum-likelihood (PRML) read channel have been developed and used to evaluate different channel configurations. It is shown that optical filtering can be used to eliminate the requirement for digital filtering in the PRML channel.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.39.808