Data storage device employing one-dimensional and two-dimensional channels
First Claim
1. A data storage device comprising:
- a disk comprising a plurality of data tracks;
a head actuated over the disk, the head comprising a plurality of read elements including a first read element and a second read element; and
control circuitry configured to;
read a first data track using the first read element to generate a first read signal;
sample the first read signal to generate first signal samples;
read a second data track adjacent the first data track using the second read element to generate a second read signal;
sample the second read signal to generate second signal samples;
process the first signal samples and the second signal samples using a first two-dimensional (2D) to one-dimensional (1D) equalizer to generate a first 1D sequence of equalized samples;
process the first signal samples and the second signal samples using a 2D-to-2D equalizer to generate a 2D sequence of equalized samples;
process the first 1D sequence of equalized samples using a first 1D detector to detect a first estimated data sequence; and
process the 2D sequence of equalized samples using a 2D detector to detect a second estimated data sequence.
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Accused Products
Abstract
A data storage device is disclosed comprising a disk comprising a plurality of data tracks. A first data track is read to generate a first read signal that is sampled to generate first signal samples. A second data track adjacent the first data track is read to generate a second read signal that is sampled to generate second signal samples. The first signal samples and the second signal samples are processed by a first two-dimensional (2D) to one-dimensional (1D) equalizer to generate a first 1D sequence of equalized samples, and by a 2D-to-2D equalizer to generate a 2D sequence of equalized samples. The first 1D sequence of equalized samples are processed using a first 1D detector to detect a first estimated data sequence, and the 2D sequence of equalized samples are processed using a 2D detector to detect a second estimated data sequence.
493 Citations
16 Claims
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1. A data storage device comprising:
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a disk comprising a plurality of data tracks; a head actuated over the disk, the head comprising a plurality of read elements including a first read element and a second read element; and control circuitry configured to; read a first data track using the first read element to generate a first read signal; sample the first read signal to generate first signal samples; read a second data track adjacent the first data track using the second read element to generate a second read signal; sample the second read signal to generate second signal samples; process the first signal samples and the second signal samples using a first two-dimensional (2D) to one-dimensional (1D) equalizer to generate a first 1D sequence of equalized samples; process the first signal samples and the second signal samples using a 2D-to-2D equalizer to generate a 2D sequence of equalized samples; process the first 1D sequence of equalized samples using a first 1D detector to detect a first estimated data sequence; and process the 2D sequence of equalized samples using a 2D detector to detect a second estimated data sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of operating a data storage device, the method comprising:
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reading a first data track using a first read element to generate a first read signal; sampling the first read signal to generate first signal samples; reading a second data track adjacent the first data track using a second read element to generate a second read signal; sampling the second read signal to generate second signal samples; processing the first signal samples and the second signal samples using a first two-dimensional (2D) to one-dimensional (1D) equalizer to generate a first 1D sequence of equalized samples; processing the first signal samples and the second signal samples using a 2D-to-2D equalizer to generate a 2D sequence of equalized samples; processing the first 1D sequence of equalized samples using a first 1D detector to detect a first estimated data sequence; and processing the 2D sequence of equalized samples using a 2D detector to detect a second estimated data sequence. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification