Detecting a periodic sequence of servo signals
AssigneeInternational Business Machines Corporation
InventorsNhan X. Bui, Roy D. Cideciyan, Robert A. Hutchins, Thomas Mittelholzer, Kazuhiro Tsuruta
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Abstract
A system and method are disclosed for detecting a periodic sequence. A value detector module detects a plurality of values of a periodic sequence. In one embodiment, a transformation module transforms the plurality of values into transformed values. A confinement module confines the values to a limited set of confined values. A correlation module correlates the confined values with a plurality of instances of the periodic sequence. In addition, a selection module selects an instance of the periodic sequence with the highest correlation to the confined values as an observed periodic sequence.
Claims20
A storage device comprising a computer readable storage medium storing computer-readable code, wherein the computer-readable code when executed on a computer causes the computer to:
- detect a plurality of values of a periodic sequence;
- confine the plurality of values to a limited set of confined values;
- correlate the confined values with a plurality of instances of the periodic sequence;
- and
- select an instance of the periodic sequence with the highest correlation to the confined values as an observed periodic sequence.
A system to detect a periodic sequence, the system comprising:
- a storage medium comprising a periodic sequence;
- a read channel configured to read the periodic sequence;
- a sequence detector comprising
- a value detector module configured to detect a plurality of values from the periodic sequence;
- a transformation module configured to transform the plurality of values into transformed values;
- a confinement module configured to confine the transformed values to a limited set of confined values;
- a correlation module configured to correlate the confined values with a plurality of instances of the periodic sequence;
- and
- a selection module configured to select an instance of the periodic sequence with the highest correlation to the confined values as an observed periodic sequence.
A method for detecting a periodic sequence, wherein a storage device stores computer-readable code that is executed by a computing system perform the following:
- detect a plurality of values of a periodic sequence;
- confine the plurality of values to a limited set of confined values;
- correlate the confined values with a plurality of instances of the periodic sequence;
- and
- select an instance of the periodic sequence with the highest correlation to the confined values as an observed periodic sequence.
Dependencies are inferred from the claim text.