Multitrack readback and multiuser detection for disk drives
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsRachel E. Learned, Robert B. MacLeod
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Abstract
Techniques for reading data from a storage medium (150) having a high track density prone to adjacent track interference are disclosed. One or more sensing elements (120) are used to extract data stored on adjacent tracks. Multiuser detection (130) is then used to detect/decode a single track that is closely spaced to its neighboring tracks, resolve interference from adjacent tracks, or to simultaneously detect/decode multiple adjacent closely packed tracks.
Claims22
A device for reading data from a storage medium having a high track density prone to adjacent track interference, the device comprising:
- a data reader having one or more sensing elements adapted to read data from the storage medium, the read data including target track data as well as interference data from one or more adjacent tracks;
- and
- a multiuser detection module adapted to jointly detect and decode the read data corresponding to multiple tracks, thereby separating the target track data from interfering track data.
A method for reading data from a storage medium having a high track density prone to adjacent track interference, the method comprising:
- reading data from the storage medium, the read data including target track data as well as interference data from one or more adjacent tracks;
- and
- jointly detecting and decoding the read data corresponding to multiple tracks, thereby separating the target track data from interfering track data.
A device for reading data from a storage medium having a high track density prone to adjacent track interference, the device comprising:
- one or more sensing elements adapted to read data from the storage medium, the read data including target track data as well as interference data from one or more adjacent tracks;
- one or more positioning arms operatively coupled to the one or more sensing elements, and adapted to center each sensing element over at least one of a different radius on the storage medium or a different track on the storage medium or a different read line on the storage medium;
- and
- a multiuser detection module adapted to jointly detect and decode the read data corresponding to multiple tracks, thereby separating the target track data from interfering track data.
Dependencies are inferred from the claim text.