Multi-Track Data Processor With Iterative Inter-Track Interference Cancellation
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsGeorge Mathew, Jongseung Park, Richard Rauschmayer, Bruce A. Wilson
Life of this patent
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Abstract
An apparatus for two-dimensional magnetic recording includes an array reader comprising a number of read sensors configured to read data from at least one track on a storage medium, a number of two-dimensional equalizer circuits each comprising inputs for receiving signals derived from each of the read sensors, each comprising an equalized output, and a number of iterative inter-track interference cancellation circuits, each operable to cancel inter-track interference in a different one of the equalized outputs from the two-dimensional equalizer circuits.
Claims20
An apparatus for two-dimensional magnetic recording, comprising:
- an array reader comprising a plurality of read sensors configured to read data from at least one track on a storage medium;
- a plurality of two-dimensional equalizer circuits each comprising inputs for receiving signals derived from each of the plurality of read sensors, each comprising an equalized output;
- and
- a plurality of iterative inter-track interference cancellation circuits, each operable to cancel inter-track interference in a different one of the equalized outputs from the plurality of two-dimensional equalizer circuits.
A method of processing data, comprising:
- reading data from a plurality of data tracks on a magnetic storage device;
- equalizing the data from the plurality of data tracks in two-dimensional loop equalizers with one-dimensional partial response targets to yield loop equalized data;
- applying a data detection algorithm to the loop equalized data for each of the plurality of data tracks to yield loop detector outputs;
- equalizing the data from the plurality of data tracks in two-dimensional backend equalizers with two-dimensional partial response targets to yield backend equalized data;
- and
- iteratively cancelling inter-track interference in the backend equalized data, detecting and decoding the data from the plurality of data tracks to yield backend decoder outputs.
An system for two-dimensional magnetic recording comprising:
- loop processing means for equalizing data from a plurality of data tracks based on one-dimensional partial response targets and for detecting values of the data tracks;
- and
- backend processing means for equalizing the data from a plurality of data tracks based on two-dimensional partial response targets, and for iteratively cancelling inter-track interference, detecting and decoding values of the data tracks.
Dependencies are inferred from the claim text.