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US 2006/0221478 A1Published application
Method and apparatus for providing a read channel having imbedded channel signal analysis
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsRichard Galbraith, Travis Oenning, Eric Tree, Bruce Wilson
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Abstract
A method and apparatus for providing a read channel having imbedded channel signal analysis is disclosed.
Claims22
A read channel, comprising:
- a noise residue extraction circuit for receiving a read signal and removing a written signal from the read signal to produce a noise residue signal;
- a noise-to-power converter, coupled to the noise residue extraction circuit, for converting the noise residue signal to a power residue signal;
- a deconvolver, coupled to the noise-to-power converter, for correlating the power residue signal with a Pseudo Random Bit Sequences (PRBS) sequence used to generate the written signal to produce a deconvolved signal;
- and
- an accumulator, coupled to the deconvolver, for accumulating the deconvolved signal.
2 more elements
A read channel, comprising:
- memory for storing data therein;
- and
- a processor, coupled to the memory, the processor being configured for performing signal analysis for the read channel, the processor further being configured for receiving a read signal and removing a written signal from the read signal to produce a noise residue signal, for converting the noise residue signal to a power residue signal, for correlating the power residue signal with a Pseudo Random Bit Sequences (PRBS) sequence used to generate the written signal to produce a deconvolved signal and an accumulator, coupled to the deconvolver, for accumulating the deconvolved signal.
A method for performing signal analysis for the read channel, comprising:
- reading a signal from a storage medium;
- removing a written signal from the read signal to produce a noise residue signal;
- converting the noise residue signal to a power residue signal;
- correlating the power residue signal with a Pseudo Random Bit Sequences (PRBS) sequence used to generate the written signal to produce a deconvolved signal;
- and
- accumulating the deconvolved signal.
3 more elements
A magnetic storage device, comprising:
- a magnetic storage medium for recording data thereon;
- a motor for moving the magnetic storage medium;
- a head for reading and writing data on the magnetic storage medium;
- an actuator for positioning the head relative to the magnetic storage medium;
- and
- a hard disk controller implementing a read channel for processing signals read from the magnetic storage medium, the hard disk controller further comprising a memory for storing data therein and a processor, coupled to the memory, the processor being configured for performing signal analysis for the read channel, the processor further being configured for receiving a read signal and removing a written signal from the read signal to produce a noise residue signal, for converting the noise residue signal to a power residue signal, for correlating the power residue signal with a Pseudo Random Bit Sequences (PRBS) sequence used to generate the written signal to produce a deconvolved signal and an accumulator, coupled to the deconvolver, for accumulating the deconvolved signal.
3 more elements
A read channel, comprising:
- means for receiving a read signal and removing a written signal from the read signal to produce a noise residue signal;
- means, coupled to the means for receiving a read signal and removing a written signal from the read signal to produce a noise residue signal, for converting the noise residue signal to a power residue signal;
- means, coupled to the means for converting, for correlating the power residue signal with a Pseudo Random Bit Sequences (PRBS) sequence used to generate the written signal to produce a deconvolved signal;
- and
- means, coupled to the means for correlating, for accumulating the deconvolved signal.
2 more elements
A read channel, comprising:
- means for storing data therein;
- and
- means, coupled to the means for storing, for receiving a read signal and removing a written signal from the read signal to produce a noise residue signal, for converting the noise residue signal to a power residue signal, for correlating the power residue signal with a Pseudo Random Bit Sequences (PRBS) sequence used to generate the written signal to produce a deconvolved signal and an accumulator, coupled to the deconvolver, for accumulating the deconvolved signal.
A magnetic storage device, comprising:
- means for recording data thereon;
- means for moving the magnetic storage medium;
- means for reading and writing data on the magnetic storage medium;
- means for positioning the head relative to the magnetic storage medium;
- and
- means for receiving a read signal and removing a written signal from the read signal to produce a noise residue signal, for converting the noise residue signal to a power residue signal, for correlating the power residue signal with a Pseudo Random Bit Sequences (PRBS) sequence used to generate the written signal to produce a deconvolved signal and an accumulator, coupled to the deconvolver, for accumulating the deconvolved signal.
3 more elements
Dependencies are inferred from the claim text.