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US 8,913,341 B1Granted
Noise cancellation using cross-track scans
AssigneeSeagate Technology LLC
InventorsJason C. Jury, Michael J. Link
Life of this patent
Estimating the term…
Abstract
Multiple signals are read, respectively, from multiple different cross-track positions of a track of a magnetic medium. Weighting coefficients for each of the multiple signals are determined. The weighting coefficients are applied to the respective signals to form weighted signals. The weighted signals are combined and the combined signal is used to recover data stored in the track.
Claims19
A method comprising:
- reading multiple signals from multiple different cross-track positions relative to a track of a medium;
- determining weighting coefficients for the multiple signals;
- applying the weighting coefficients to the multiple signals to form weighted signals;
- combining the weighted signals to form a combined signal;
- and
- recovering data stored in the track using the combined signal,
- wherein the combined signal has a signal to noise ratio that is higher than a signal to noise ratio of any of the multiple signals.
4 more elements
An apparatus comprising:
- a controller capable of being coupled to a read transducer and configured to cause a read transducer to read multiple signals from multiple cross-track positions relative to a track of a magnetic medium;
- a multiple input/common output (MICO) unit configured to
- determine a weighting coefficient for each signal;
- apply the weighting coefficients to the respective signals to determine weighted signals;
- form a combined signal which is a combination of the weighted signals, the combined signal having a signal to noise ratio that is higher than a signal to noise ratio of any of the signals;
- and
- recover data using the combined signal.
4 more elements
A system comprising:
- a transducer to read a first signal at a particular cross-track position relative to a target track and read a second signal at the particular cross-track position;
- a controller to determine weighting coefficients for the first and second signals, apply the weighting coefficients to the first and second signals to form weighted signals, combine the weighted signals to form a combined signal, and recover data in the target track using the combined signal, wherein the combined signal has a signal to noise ratio that is higher than a signal to noise ratio of each of the first and second signals.
Dependencies are inferred from the claim text.