Patent ID: 8462602
Filing Date: 2013-06-11
Classification: G11B

Abstract:
1. A data recovery device, used for recovering a radio frequency signal in an optical storage system to a clock signal and a modulation signal, the data recovery device comprising: an analog to digital converter, for converting the radio frequency signal into a plurality of sampling data points; a filtering-equalizing unit, for compensating gain values of the sampling data points, and filtering noises of the sampling data points; a zero crossing detector, separating numbers of the sampling data points above and below a comparison level; a data phase locked loop, for obtaining a plurality of retiming data points among the sampling data points and the clock signal; a data mapping unit, for selecting a plurality of regional maximum data points and minimum data points from the retiming data points, and determining whether or not to respectively map the maximum data points and the minimum data points to a first level and a second level for partially reconstructing the retiming data points, wherein the first level and the second level are respectively greater than and less than a reference level; and an estimation unit, for recovering the reconstructed retiming data points to the modulation signal according to a partial response maximum likelihood method.