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US 2014/0233129 A1Published application
Noise predictive filter adaptation for inter-track interference cancellation
AssigneeLSI Corporation
InventorsJun Xiao, Jongseung Park, Fan Zhang, Ivana Djurdjevic
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Abstract
Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for adapting noise predictive filters for inter-track interference cancellation in a data processing system.
Claims20
A data processing system comprising:
- a first noise predictive filter circuit operable to filter digital data;
- a data detector circuit operable to apply a data detection algorithm to an output of the first noise predictive filter circuit to yield a detected output;
- an inter-track interference cancellation circuit operable to reduce inter-track interference in the digital data based in part on the first detected output to yield cleaned data;
- a second noise predictive filter circuit operable to filter the cleaned data;
- and
- an adaptation circuit operable to generate filter coefficients for the second noise predictive filter circuit based in part on the cleaned data and on a signal derived from an output of the second noise predictive filter circuit.
3 more elements
A method for data processing, comprising:
- performing loop processing of a digital signal, comprising noise predictive filtering of the digital signal to yield a filtered digital signal and detection of data values in the filtered digital signal to yield detected values;
- cancelling inter-track interference in the digital signal based on the detected values and on side track data to yield cleaned data, wherein inter-track interference comprises interference between a current magnetic storage track and a neighboring magnetic side track;
- performing backend processing of the cleaned data, comprising noise predictive filtering of the cleaned data to yield a second filtered digital signal, and detection and decoding of the second filtered digital signal;
- and
- adapting filter coefficients used in the noise predictive filtering of the cleaned data based on the cleaned data.
2 more elements
A storage device, comprising:
- a storage medium;
- a head assembly disposed in relation to the storage medium and operable to provide a sensed signal corresponding to a data set on the storage medium;
- and
- a read channel circuit comprising:
- a loop processing circuit comprising a first noise predictive filter operable to filter digital data derived from the sensed signal, a loop detector circuit connected to the loop processing circuit, and an inter-track interference cancellation circuit connected to the loop detector circuit;
- and
- a backend processing circuit comprising a second noise predictive filter and an adaptation circuit operable to generate filter coefficients for the second noise predictive filter circuit based in part on cleaned data from the inter-track interference cancellation circuit and on a signal derived from an output of the second noise predictive filter circuit.
4 more elements
Dependencies are inferred from the claim text.