Low complexity inter-track interference cancellation receiver for magnetic multiple-input, multiple-output (MIMO) channel
AssigneeHGST Netherlands B.V.
InventorsJonathan Darrel Coker, Travis Roger Oenning, Srinivasan Surendran
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Abstract
A receiver utilizes a plurality of read elements, each generating a read-back signal in response to a data track positioned beneath the read element. The plurality of read-back signals are each provided to at least one space-time interference cancellation filter, which generates a filtered output that maximizes a signal associated with one of the plurality of data tracks. The filtered output is provided to a one-dimensional Viterbi detector, which is configured to generate in response an output representative of a data sequence written to one of the plurality of data tracks.
Claims17
A receiver for a magnetic storage medium configured to receive read-back signals provided by a plurality of read elements positioned over a plurality of data tracks, the read channel comprising:
- at least one space-time interference cancellation filter configured to receive read-back signals generated by the plurality of read elements and to provide a filtered read-back signal associated with one of the plurality of read element based on the plurality of read-back signals;
- and
- at least one 1-dimensional Viterbi detector configured to receive a filtered read-back signal from one of the plurality of space-time interference cancellation filters, and to provide in response an output representative of a data sequence written to one of the plurality of data tracks.
A magnetic storage system comprising:
- a magnetic medium having a plurality of data tracks;
- a plurality of read elements, each read element positioned over one of the plurality of data tracks and configured to generate a read-back signal in response, at least in part, the data track associated with the read element;
- a plurality of space-time interference cancellation filters, each space-time interference cancellation filter configured to receive read-back signals generated by the plurality of read elements and provides a filtered read-back signal associated with one of the data tracks;
- and
- a plurality of one-dimensional Viterbi detectors, wherein each one-dimensional Viterbi detector is configured to receive a filtered read-back signal from one of the plurality of space-time interference cancellation filters, and to provide in response an output representative of a data sequence written to one of the plurality of data tracks.
A method of reading data from a magnetic media, the method comprising:
- generating read-backs signals using a plurality of read elements, each read element positioned over one of a plurality of data tracks;
- providing each of the plurality of read-back signals to at least one space-time cancellation filters;
- and
- generating, in response to the plurality of read-back signals, a filtered output that maximizes a signal associated with one of the plurality of data tracks;
- applying a one-dimensional Viterbi detector to the filtered output to generate an output representative of a data sequence written to one of the plurality of data tracks.
A method of reading data from a magnetic media, the method comprising:
- generating read-backs signals using a plurality of read elements, each read element positioned over one of a plurality of data tracks;
- providing each of the plurality of read-back signals to at least one space-time cancellation filters;
- and
- generating, in response to the plurality of read-back signals, a filtered output that maximizes a signal associated with one of the plurality of data tracks, wherein generating a filtered output includes applying a plurality of weights to the received read-back signals in order to generated a filtered output that maximizes a signal to interference plus noise ratio (SINR) associated with one of the plurality of data tracks.
Dependencies are inferred from the claim text.