Asynchronously sampling wide bi-phase codes
AssigneeMaxtor Corporation
InventorsAra Patapoutian, Peter McEwen, Eduardo Veiga, Bruce D. Buch
Life of this patent
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Abstract
Sampling data with wide bi-phase code symbols includes sampling a wide bi-phase code symbol in the data a number (N) of times to produce samples of data, selecting a subset of the samples, determining which sample in the subset of samples has a largest magnitude, and selecting a subset of samples in a subsequent wide bi-phase code symbol based on a sample in a previous subset that has the largest magnitude.
Claims37
A method of sampling data that includes wide bi-phase code symbols, the method comprising:
- sampling a wide bi-phase code symbol in the data a number (N) of times to produce samples of data;
- selecting a subset of the samples;
- determining which sample in the subset of samples has a largest magnitude;
- and
- selecting a subset of samples in a subsequent wide bi-phase code symbol based on a sample in a previous subset that has the largest magnitude.
An apparatus comprising:
- a controller which (i) selects a subset of the samples, (ii) determines which sample in the subset of samples has a largest magnitude, and (iii) samples a subsequent wide bi-phase code symbol in the data based on which sample in the subset of samples has the largest magnitude.
A computer-readable medium which stores executable instructions for sampling data that includes wide bi-phase code symbols, the instructions causing a processor to:
- control a reading head to sample a wide bi-phase code symbol in the data a number (N) of times to produce samples of data;
- select a subset of the samples;
- determine which sample in the subset of samples has a largest magnitude;
- and
- sample a subsequent wide bi-phase code symbol in the data based on which sample in the subset of samples has the largest magnitude.
An apparatus for sampling data that includes wide bi-phase code symbols, the apparatus comprising:
- means for sampling a wide bi-phase code symbol in the data a number (N) of times to produce samples of data;
- means for selecting a subset of the samples;
- means for determining which sample in the subset of samples has a largest magnitude;
- and
- means for selecting a subset of samples in a subsequent wide bi-phase code symbol based on a sample in a previous subset that has the largest magnitude.
Dependencies are inferred from the claim text.