Systems and methods for calibrating read and write operations in two dimensional magnetic recording
AssigneeMarvell World Trade Ltd.
InventorsQiyue Zou, Michael Madden, Gregory Burd
Life of this patent
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Abstract
Systems and methods are provided for calibrating signals retrieved from a storage device using a first reader and a second reader. The systems and methods further include reading a first signal using the first reader and a second signal using the second reader. Control circuitry computes a calibration metric associated with the first reader and the second reader based on the combination of the first signal and the second signal. At least one of the first signal and the second signal is subsequently decoded based in part on the computed calibration metric.
Claims20
A method for calibrating signals retrieved from a storage device using a first reader and a second reader, the method comprising:
- reading, using control circuitry, a first signal using the first reader and a second signal using the second reader;
- computing, using the control circuitry, a calibration metric based on a combination of the first signal and the second signal, wherein computing the calibration metric comprises:
- correlating a first portion of the first signal and a second portion of the second final to obtain a cross-correlation sequence,
- detecting a peak in the cross-correlation sequence, and
- computing a time offset based on the detected peak of the cross-correlation sequence;
- and
- decoding at least one of the first signal and the second signal based in part on the computed calibration metric.
A system for calibrating signals retrieved from a storage device, the system comprising:
- a first reader configured to read a first signal;
- a second reader configured to read a second signal;
- control circuitry configured to compute a calibration metric based on a combination of the first signal and the second signal by:
- correlating a first portion of the first signal and a second portion of the second final to obtain a cross-correlation sequence,
- detecting a peak in the cross-correlation sequence, and
- computing a time offset based on the detected peak of the cross-correlation sequence;
- and
- a decoder configured to decode at least one of the first signal and the second signal based in part on the computed calibration metric.
Dependencies are inferred from the claim text.