Data reproduction apparatus and method with improved performance by adjusting filter coefficients of equalizer
AssigneeSamsung Electronics Co., Ltd.
InventorJae-Seong Shim
Life of this patent
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Abstract
A data reproduction apparatus for adjusting filter coefficients of an equalizer including a digital filter, and connected before a Viterbi detector and a method therefor. A level of the output value of the equalizer is detected based on a reference level set in the Viterbi detector, and a level error of the detected level with respect to a predetermined reference value is detected. The filter coefficients of the equalizer are adjusted such that the level error is minimized, thereby improving the detection performance of the Viterbi detector.
Claims6
A data reproduction apparatus for detecting data based on partial response maximum likelihood (PRML), the apparatus comprising:
- an equalizer comprising a digital filter;
- a level error detector which extracts a level of an output value of the equalizer based on a reference level set in the data detector, and which detects a level error between the level of the output value and a predetermined reference value;
- and
- a coefficient adapter which adapts filter coefficients of the equalizer such that a difference between the level error and a target level error is minimized.
Dependencies are inferred from the claim text.